Category Archives: Minerals

The Topaz Mineral

November 28, 2018 HFM Leave a comment

”Detail of topaz minerals" — Photo by carlosfredericopinheiro – yayimages.com

A gemstone that occurs in a wide variety of colors in both natural and treated form, topaz is a rare silicate mineral. Often confused with other gemstones, the very popular treated versions of topaz with a blue color are shrugged off as cheap apatite and aquamarine gemstones. The more neutral colored topaz are confused with citrine and smoky quartz but there are several specimens of the topaz mineral that rival the likes of sapphire and diamond. Here is what you need to know about the topaz gemstone.

What is Topaz?

Topaz has a chemical composition of Al2SiO4(F,OH)2. Occurring usually in igneous rocks like rhyolite and pegmatite, they form as they cool down over the years. They are also naturally occurring in water-worn pebbles from streams that flow down from these rocks.

A well-known gemstone, it comes in a large variety of colors. Some of the colors are naturally occurring, while others are achieved through treatments of the colorless or pale topaz specimens. Different processes like heat treatment, radiation, and metallic coatings are used to give topaz its different colors.

The most popular form of topaz is in the blue color. Blue topaz does not occur commonly in its natural form and most of the blue topaz in the market is actually treated to achieve that color. This attractive color that makes it popular all over the world.

The Physical Properties of Topaz

As with any other gemstone, its hardness is considered to be one of the foremost qualities for topaz. This particular gemstone is a very hard mineral found in nature. The hardness index on the Mohs Hardness Scale puts topaz crystal at an 8 from a scale of 10.

The most common and naturally occurring colors in topaz crystals are colorless to milky, yellow to brownish hues. It also exists in blue, red, purple, pink and red but they are very rare and not often found as gem quality in nature.

If the topaz crystal is able to grow unrestricted, it forms orthorhombic crystalline structures, which typically have striations running parallel to the long axis of the crystal.

It also happens to have a basal cleavage that is quite distinctive. The cleavage breaks along the long axis of the crystal. This distinctive cleavage is the reason why topaz is a very fragile crystal, despite ranking among the hardest gemstones out there. The Mohs Scale Hardness index is nothing more than an indicator of how scratch-resistant a particular crystal is. The actual resistance to breakage is known as tenacity for crystals and topaz crystal is not that tenacious.

Considering the fact that the mineral composes silicone, aluminum and gaseous elements, the specific gravity of topaz being 3.4 to 3.6 is considered unusually high.

Use as a Gemstone

For the longest time in history, yellowish gemstones were called topaz in many parts across the world. The earliest of gemstone traders did not even realize that the yellow gemstones were actually all different materials.

It was only around two centuries ago that people began to realize these yellow gemstones might be an assortment of different minerals. Around that time that it was also discovered that topaz can exist in different colors. Before the 1970s, if you went into a jewelry store asking for topaz, jewelers would show you gemstones that were yellowish or brownish in color. But the 70s and the 80s saw blue topaz become increasingly popular. Blue topaz is an incredibly beautiful form of the crystal and is very popular because it’s aesthetically pleasing look has made it even more marketable.

Treated Blue Topaz

Among the various treatments used for changing the color of the topaz gemstone, radiation is the most common because it gives the gemstone its iconic blue color. The type of radiation used to treat the crystal in order to achieve this color can also result in the topaz becoming radioactive. That is not at all a reason for worry though. The radioactive nature of blue topaz actually wears off quite fast. The radiation starts to wear off from the moment that the treatment is completed. The United States Nuclear Regulatory Commission does not allow topaz crystals to be handled in any way until all of the radiation wears off.

This is why companies using radiation treatment store them safely until their radioactivity decay comes down to a level that is safe for handling, manufacturing, and selling on the market.

Occurrence of Topaz

Fluorine in the Al2SiO4(F,OH)2 structure of topaz is the limiting factor in the formation of this mineral. This is also the reason why the topaz is so rare. A high enough concentration of fluorine gas to form topaz is not very common and happens in a few geological regions.

Topaz usually grows in the form of veins within igneous rocks, formed during the later stages of magma cooling down. There have been occurrences where topaz precipitating in the cavities of these rocks developed proper crystals. These crystals can have good clarity levels and can be used as gemstones.

The rarest form of topaz is Imperial Topaz. It is a naturally red form of the topaz crystal, which is so rare that only 1% of all the topaz gemstones that exist have this color. Imperial Topaz has a unique reddish-orange tone. Occurring mostly in Brazil and in the Ural Mountains of Russia, it was first used in imperial jewels for Russian Royalty in the 18th century. That is why it receives its name as the Imperial Topaz.

Topaz is found in several places around the world including India, Russia, Zimbabwe, Nigeria, and Australia. The leading producer of the topaz crystal is Brazil, which has a large number of gems. Sri Lanka is another important exporter of the topaz crystal.

Jewerly, Minerals

Carats: A Unit Used to Weigh and Value Gemstones

November 11, 2018 HFM Leave a comment

Gemstones and other rare earth metals are primarily made of solid particles. For that matter, their amounts are scientifically measured through units of weight. These units, such as kilograms, grams, pounds and metric tons are extensively used and therefore, people have a fair idea about them.

However, when it comes to measuring the weight of a gemstone, all these prevailing units prove to be way bigger. For instance, barring exceptions, you can’t find gemstones in grams, let alone other larger units. Therefore, the gem industry has standardized a different weight unit to quantify gemstones to assess their value. This unit is called ‘carat’.

Since the carat is exclusively used in the gem industry, many people don’t know what this unit entails. In this article, we are going to discuss it in detail so that you are better aware when dealing with gems.

The Connection between Carat and Carob Seed

Like many existing systems with their roots in interesting historical anecdotes, the story of carat coming into existence is also an intriguing one. It is said that some gem traders somewhere in the 16th and 17th century decided to set the value of precious stones in proportion to their exact weight. During that time, businesses were run without any established unit system for any type of measurement.

Traders who used to work in the African marketplace are aware of carob seeds. The interesting bit regarding these seeds is that all of them are identical in their shape, size, and mass. Carob seeds were once part of a staple diet of many African nations because of its rich sugar content.

The uniformity of carob seeds sparked the idea to use them as counterweights for precious and small items i.e. gemstones. There use in a balance scale as a counterweight became quickly popular because of the reliability provided by the consistent shape and weight of carob seeds. Soon after this experiment, it became a norm in the gem industry to weigh gemstones against carob seeds.

After the advent of sensitive weighing machines, it was found that a single carob seed approximately weighs 200 milligrams. Meanwhile, the pronunciation of ‘carob’ had also been distorted with its use as a weighing unit in different parts of the world. After some years of this standardization, people had started calling it ‘carat’. So, when it was formally reorganized as a weight unit at the beginning of the 20th century, it was given the name ‘carat’, the distorted term which had become more popular than the original term.

Carat or Karat

It is really important to discuss the confusion surrounding these two words with the same phonetics. The term ‘karat’ is mostly associated with gold, which is not a gemstone but revered and valued as one.

To put in simple words, karat is an arbitrary unit used to measure the purity of gold. Pure gold is considered 24-karats. Since pure gold is extremely soft and malleable, it is mixed with other minerals (copper, nickel etc) for stabilization. Coins, jewelry and other gold items that we usually see are not made of a pure specimen. Let’s try to understand karat and its distinction from carat through numbers.

An 18-karat gold item is made of a 75% pure mineral. This means 18 parts of gold is mixed with six parts of other minerals to stabilize the contrived object. In a similar manner, every object made of gold is divided into 24 parts to measure its purity. A 12-karat gold specimen would include 12 parts of pure gold and 12 parts of stabilizing minerals.

Therefore, karat and carat are not one and the same. Karat is not a weighing unit and neither is it used for any material except gold. But carat is a standardized metric unit of mass and the entire worldwide gem trade uses it to weigh and value precious stones.

Subdivisions of Carat

Not all gemstone are equal in their exhibition and value. A carat of opal can’t be equal to the same weight of an emerald or ruby. And then there is a gem of all gems i.e. diamond. People who have brought this king gemstone in the form of jewelry would be well aware of the value of a carat of diamond.

In most of the diamond rings, the stones used are way less than one-carat. For that matter, jewelers have subdivided one carat into 100 pointers. A single pointer is equal to two milligrams. If a diamond cut weighs 0.25 carat, it can be referred to as a ‘twenty-five pointer’ stone.

Diamonds and Carats

Diamond cut history diagram — Diagram of different diamond cuts

As mentioned earlier, carat measurements are very essential when it comes to measuring diamond cuts. The price of a diamond is actually derived by the shape of the cut, color of the specimen, clarity of the stone and its weight in carats.

The Craze of Magic Sizes

In terms of their carat weight, diamonds also come in some ‘magical sizes’. Diamond cuts with the definite carat measurements are usually referred by this term. For instance, one-carat, half-carat, and even three-quarter carat diamonds are called magic sizes and have a price higher than the regular specimens with arbitrary carat or pointer measurements. Diamonds can run into hundreds of thousands of dollars and even millions. Their price all depends upon their cuts, color, clarity and their weight in carats.

The craze among gem lovers with respect to magic sizes can be understood by the fact that a one-carat diamond specimen can be 20 percent more expensive than a 0.99-carat cut. It is important to mention here that both these specimens look exactly the same in ornamental objects and even an expert can’t tell them apart without measuring their weight.

Minerals

Spinel: A Gemstone Long Known as Ruby and Sapphire

November 3, 2018 HFM Leave a comment

You would certainly not like it if your identity is taken by someone else even by mistake. Spinel would feel the same way if it was a living being. Spinel is a gemstone that has been around for centuries and also has a great demand as a precious stone but under other identities. Gemologists have noted that spinel has been used in many historic and prized ornamental items but wrongly attributed as a ruby or sapphire.

Color: The Primary Reason behind Incorrect Identification for Spinel

Hundreds of years ago, when people were not able to identify gems on the basis of their physical and chemical properties, color was the only feature that would help people in differentiating various gemstones. Among gem traders, all sparkling red stones were rubies and all deep and pure blue gemstones were sapphires.

It is important to mention that spinel is a gemstone that exists in both colors. For that matter, red and blue specimens of spinel were treated and used as rubies and sapphires, respectively. Both of these infamous gemstones actually belong to corundum family, an aluminum oxide mineral found in nearly every type of rock formation.

Geological Sites of Spinel Deposits

Like corundum, spinel is an oxide mineral, formed through the same process. However, this gemstone is found in slightly different geological sites as compared to corundum. Geologists have identified three common sites from where spinel is usually excavated or obtained.

Spinels are found in alluvial deposits, which look like pebbles. They actually end up down the stream from the water coming out of spring sources and other water reservoirs. These spinels actually break away from rock formations because of the pressure of water torrent exerted on the large stones. Many of the spinel specimens used as a ruby were actually found in alluvial deposits.
Some of the spinel deposits are also found in igneous rocks in the form of randomly-shaped grains.
Spinels are also formed as crystals in dolomite and limestone deposits after they have undergone contact metamorphism.

Difference between Spinel and Corundum

With technological progressions leading to better tools and techniques in the field of geology and gemology, it has now been firmly verified that spinel is fairly different from ruby and sapphire. Let’s have a look at the characteristics through which one can tell spinel apart from corundum minerals.

Chemical Composition

Assortment of Crystals_of_spinel_and_chondrodite — Crystals of spinel and chondrodite

Spinel and corundum both are aluminum oxides. However, the former also contains magnesium. The presence of an entire metal element in every molecule of the mineral changes many of its properties.

Crystal Lattice

The microscopic crystal lattice of both minerals is different. The addition of magnesium converts spinel’s crystal plane into an isometric form. On the other hand, sapphire and ruby remain hexagonal at their molecular crystallization.

Geometrical Shape

Gemologists have also found out that spinel and corundum gemstones are dissimilar to each other by their geometrical shapes. When faceted and treated, corundum specimens usually come out in the shape of a prism or hexagon, whereas spinel specimens transform into dodecahedrons or octahedrons.

Hardness

Sapphire and ruby are slightly harder than spinel. The Mohs hardness of spinel usually lingers between 7.5 and 8 while corundums are 9 on the scale.

Historically Famous Spinels with Mistaken Identity

As mentioned earlier, spinels have been treated as other precious gemstones throughout history. Here, we are going to discuss a couple of famous ones.

The Timur Ruby

Timur Ruby is one of the most famous spinels with a mistaken identity. It was found from Afghanistan during British rule in India during the 17th century. It is believed that it originally belonged to the collection of Timur the lame, the famous Turco-Mongol emperor of the 12th century. In 1849, the stone was presented to Queen Victoria by the East India Company with many other precious stones. It was later appended in the necklace of the Queen. Right now, this spinel known as ruby is a part of British Royal Collection.

The Black Prince’s Ruby

This is another famous spinel being mistaken as ruby. As historians cite, the first known owner of this 170-carat sparkling red spinel was the Moorish Prince of Granada during the 14th century. From then on, the stone saw many owners and eventually ended up as the crown jewel of the United Kingdom. Currently, it is affixed on Imperial State Crown of the Kingdom sharing the space with infamous Cullinan II, a diamond weighing more than 3,000 carats.

Spinel as Gemstone

Now when identifying gemstones has become rather easy, spinels of different colors are popular among gem lovers. Yes, spinels also have colors other than red and blue. Pink, purple, orange and colorless spinel variants also exist. Nevertheless, red and blue spinels are still more popular because of their resemblance with ruby and sapphire.

Red and Blue Spinels are Rare

Red and blue spinels are rare, so much so that they are even less abundant than the real rubies and sapphires. But this rarity doesn’t translate into a hefty price tag. This shows that the rarity of gemstone doesn’t always dictate its price. Apart from blue and red variants, spinels with red and orange shades also get some traction in the gem industry. In general, gem-grade spinels are not extensively prospected and mined. For that matter, jewelry trade doesn’t promote the stone like other popular gemstones.

Birthstone for the Month of August

In order to spread the awareness regarding the frequently overlooked stone of spinel, the groups Jewelers in America and the American Gem Trade Association declared spinel as the gemstone for the month of August two years ago. Now peridot and spinel share the status of August Birthstone. Inclusion in the list of birthstones will definitely provide spinel with the much needed continuous promotion.

Before we wind up the article, it is worth mentioning that spinel is also produced synthetically. It has a similar chemical composition as the real specimen but not produced for the gem and jewelry industry. It is majorly produced to be used as refractory on metallic tools.

Minerals

The Intriguing Contrasts Between Diamonds and Coal

November 3, 2018 HFM Leave a comment

Humans have been intrigued by diamonds since time ancient times. These stones have always been in demand and will continue to be until the culmination of life on the planet. Interestingly, we have made the enigma of the diamond more interesting and inviting by adding coal to the equation, all thanks to scientific evolution and many misconceptions.

We all have heard diamonds and coal in the same sentence because of the falsified association that has been developed in the last few decades. In this article, we are going to discuss the interesting dichotomy of diamonds and coal—why they are linked to each other—how they are different and are diamonds really made out of coal?

Carbon: The Common Substrate of Both Geological Elements

During the 20th century when studies and research on the microscopic structural arrangement of the elements and materials were initiated, the world came to know about this interesting trivia that both coal and diamonds are made of carbon. This is the primary reason behind its widespread misconception that diamonds are actually the refined, enhanced and extravagant form of coal.

Popular Culture Strengthens this Misconception Further

The fact that carbon is the common substrate of both these elements also made its way into popular culture and inspirational quotes. “A diamond is just a lump of coal that did well under pressure”, “Perhaps time’s definition of coal is the diamond” and other similar paraphrased quotes have become popular among the masses. These adages might inspire some people to handle their stress in a better manner and to wait for the right time. But there is no truth in the assertion that with more time and under extreme pressure, coal is converted into diamonds, not at least according to what geologists and scientific studies tell us.

Similarly, the most iconic superhero of our time has also helped in peddling this misconception. Superman, the Kryptonian visitor on Earth, has been shown in many comic strips and cartoon films to convert a lump of coal into diamonds by just crushing them in between his palms.

Of course, this continuous yet unintended spread of false information has also led many into believing that coals and diamonds are distant brothers from the same father. Or coal is just a premature form of the diamond.

Why do People Love to Discuss Coal and Diamonds Together?

Innate human tendencies are also responsible for this unsubstantiated association. There is a huge disparity between the worth, uses and general social discernment regarding coal and diamonds. Coal is an industrial mineral majorly used to produce energy with no aesthetic value whatsoever. In contrast, the diamond is an elite gemstone and we think it has now become redundant to go into the details of the diamond’s aesthetical features.

Regarding the worth of both these geological specimens, let’s illustrate an interesting scenario: Without any permission and authorization, you can easily pick a carat or even more of a coal sample without anyone even batting an eye. On the other hand, one may have to plan an entire heist to get the same amount of diamonds in a similar manner. So, amid all these stark different realities of the two specimens, the thought that diamonds and coal are actually the same feeds the human fascination.

How Diamonds and Coals are not Related?

Now, let’s have a look at the scientific and geological reasons how these minerals are not related to each other.

The Site of Formation

Diamonds and coal are formed at pretty different locations beneath the ground. The diamonds are formed from carbon and its derivatives, some 200 miles and more beneath the surface. On the other hand, coal formation usually takes place way closer to the surface of the earth. Even a distant coal mining site is only deep as Two miles into the ground.

Secondly, their excavations also suggest that they are different geological specimens. The majority of coal mining is done at the same location where this sediment rock is naturally formed. However, that’s not the case with diamond mining. Miners don’t dig 200 mile long trenches (it’s not even possible) to excavate diamond deposits. The mined diamonds are actually the ones that come close to the surface of the earth from their original site of the formation during volcanic eruptions.

The Form of Carbon

Diamonds and coal are derived from carbon. But that doesn’t mean the similar carbon composition is used in the formation of both. Diamonds are made from the purest carbon deposits. This is one of the reasons behind the exceptional clarity of the diamond specimen. Meanwhile, carbon used in the formation of coal is decked with impurities such as nitrogen, oxygen, sulfur, and selenium. These impurities are also the reason why coal-burning leads to greenhouse emissions.

The carbon used in the formation of the diamond sometimes contains minor traces of these impurities, but that doesn’t change the basic structure and appearance of the gem. In fact, different natural shades and color tinges in some diamond specimens are present because of them.

In addition, the sources of carbons are also pretty dissimilar for both specimens. Diamonds are made from carbon deposits that are inherently present in the earth’s crust. In contrast, the majority of coal deposits are actually formed from the carbon present in decomposed ancient plants.

Temperature and Pressure Treatment

The components of the process of their formation also differentiate these two geological specimens. Carbon gets into a particular form to become a diamond under extreme temperature and pressure conditions that are only found within the mantle of the planet. Similarly, the heat and pressure treatment is followed by a long cooling process that develops the characteristic hardness of the diamond. The formation of coal also involves temperature and pressure changes. However, they are nowhere near the process of a diamond is formed.

All the above discussion has made it quite clear that diamonds and coals are not related to each other. Apart from the difference of color and hardness, there are many other divergences between these two carbon specimens that we have thoroughly covered in this article.

Minerals

Understanding the Mohs Scale and the Durability of Gemstones

October 26, 2018 HFM Leave a comment

Diamond gem with reflection on blue background. Photo: Big Stock

Whenever you talk about the hardness of minerals and gemstones, you might have heard people from the industry measure the hardness on the Mohs Scale. The rating on the Mohs scale is one of the most important tests for the quality of mineral specimens and this comes in handy when you are looking to purchase jewelry.

For example, if you buy a ring that contains Gypsum, you might want to rethink that since this stone has a hardness rating of 2 on the Mohs Scale, which is low and subsequently it may often get scratched due to the continuous movement and friction to other materials when working with our hands. Deciding to wear it as an earring would be more practical. We are going to take a look at exactly what is the Mohs scale and some other qualities of gemstones that allow us to properly determine their durability.

What Is The Mohs Scale?

The Mohs Scale or the Mohs Hardness Scale was created in the early 1800s by a man called Friedrich Mohs. He was considered to be one of the most renowned mineralogists at the time. He created this measure to find out and determine the comparative resistance that a mineral has to scratch.

The Mohs Hardness scale was revolutionary for the mineral and gemstone industry because right after its creation, people were able to use this scale to classify the durability of gemstones. However, if you are looking for a truly durable gemstone that can withstand the test of time, there is more to determining just durability besides the hardness on the Mohs Scale.

This scale is essentially based on a resistance factor that a mineral has to scratch. It is considered to be the only characteristic that is used to measure and determine the rank of the gemstones on the scale.

According to the findings of Friedrich Mohs and the Mohs Scale that he created, a gemstone can only be scratched by another gemstone that ranks higher. For instance, you cannot expect Topaz to be able to scratch Quartz because Topaz has a reading of ‘8’ and Quartz has a reading of seven. That means Quartz is softer than the Topaz. Similarly, you can expect the Corundum to be able to scratch Topaz because the Corundum registers at ‘9’ on the Mohs Hardness Scale.

It’s important to keep in mind that the Mohs Scale is not necessarily a linear one. This means that even though diamonds register at a reading of 10, they are not 10 times as hard as Talc, which registers as ‘1’.

The Mohs Scale is only a measure of resistance that a stone has to surface scratching.

While the Scale is considered to be one of the most important factors in determining the durability of a gemstone, it is only a single aspect of it. The overall durability of a gemstone can be different from the surface resistance that it has since surface resistance is only one factor when testing durability. For instance, an emerald has a Mohs Scale rating of 8 but it does not wear as well as a Topaz which also rates as 8. This is because there are additional characteristics within the emerald stone that make its overall durability different.

Other Factors that Determine Gemstone Durability

If the Mohs Scale is not enough to determine the overall durability of a gemstone, what are the characteristics of gemstones that make them durable?

The additional properties and characteristics to determining the durability or how well they respond to the test of time are cleavage, molecular bonds, stability, treatments, and enhancements among other things.

Let’s take a look at some of the most important determining factors for the durability of a gemstone.

Cleavage

The gemstone cleavage is its ability to break cleanly along a certain distinct line. This depends on the crystalline structure that the different kinds of gemstones have. Gemstones can have either a perfect cleavage, a completely non-existent one, or anywhere in between the two extremes.

Diamonds have perfect gemstone cleavage. It means that a diamond can be split into two pieces by striking it at the perfect spot even with a softer mineral. The cleavage is particularly important when it comes to the shaping and polishing of stones. A lack of knowledge about the cleavage of a gemstone can ruin even the hardest gemstones on the Mohs Scale.

Stability

The stability is based on how well the mineral can endure different conditions in the environment; such as pressure, chemicals, and temperatures. Some gemstones like the unheated amethyst can lose their natural color upon exposure to heat. Opals are minerals that are particularly susceptible to changes in temperature. They can even crack if there is a sudden temperature change. which indicates that they are not one of the most stable minerals.

A set of molecules — “DSC_2324b.jpg”by i(saw) e(saw) is licensed under CC BY-NC 2.0

Molecular Bonds

The crystalline structure or the molecular bonds of a gemstone are other important factors in determining overall durability. Some stones have a high rating on the Mohs Hardness Scale but their overall durability happens to be low because their molecular structure is not that strong. Jade happens to have a 7.0 rating on the Mohs Scale but the overall durability of the mineral is much more than that because it has a strong molecular structure.

Treatments & Enhancements

Several gemstones go through different processes of treatment when they are being refined. The processes involved are usually done to improve either the color or the overall integrity of the stone, based on how it is needed. The most common form of enhancement to gemstones is heat treatment. It can be used to affect the color of some gemstones that are susceptible to heat. The different treatments can have an impact on a mineral’s overall durability depending on the qualities of that particular stone.

Final Thoughts

It is important to be familiar with mineral durability if you have an interest in gemstones. Knowing this information will help you to find not only the most beautiful stones but also the ones that will stand the test of time.

Minerals

Herkimer Diamonds: The Rare Form of Quartz

October 23, 2018 HFM Leave a comment

Quartz is a silicon mineral naturally found in crystalline form in all parts of the world. Even though they are excavated in the form of crystals, the specimens don’t have any noteworthy financial demand in the gem industry.

However, there is a rare form of quartz that has a different appearance from regular specimens, and subsequently enjoys great recognition among gem lovers and collectors.

This rare specimen of quartz is called the Herkimer Diamond. Yes, a quartz mineral denoted by the word ‘diamond’. But it is not a diamond so don’t get confused. We are going to clear up the origination of this name as well as many other aspects of this exceptional crystal in this article.

Why Herkimer?

These peculiar quartz specimens were first discovered in Herkimer County in the state of New York. Now, they are also mined in Arizona and globally, this particular mineral has been discovered in China, Norway, and Afghanistan.

The discovery of the Herkimer Diamond in the US doesn’t imply that it was found within the last two or three hundred years. Historical anecdotes suggest that Native Americans and early settlers discovered this special stone somewhere around the 15th century in water streams. Its peculiar double-edged appearance immediately caught the interest of Mohawk Indians. These Herkimer discoverers not only use it as an ornamental object but also employed it in different tools because of its pointed nature.

Why Call it a ‘Diamond’?

The Herkimer gemstone is called ‘diamond’ because of its naturally developed faceting on both ends. The formation of this quartz crystal looks more attractive and has a bit of a diamond’s brilliance when it is polished. It is also said the people who originally discovered it thought of it as a diamond and from then on, the ‘diamond’ stuck to its name.

What’s the Difference between Regular Quartz and the Herkimer Diamonds?

Now it’s time to discuss the underlying reasons which make the Herkimer Diamond different from regular quartz crystals. Herkimer diamonds stand apart from other quartz crystals because of their double termination trait. Yes, these are the same characteristics that provide the crystals with facets on both ends. Quartz innately appears elongated because of its hexagonal structure. And in the case of the Herkimer Diamond, this elongation is more prominent due to the pointed (faceted) two ends of the stone.

How Double Termination Develops

Quartz is formed in and around rocks after millions of years of chemical and physical changes involving silicon and oxygen and affects its crystal formation. Herkimer crystals are also formed through this same process except that they don’t get in contact with the rock formation process. The environment in which Herkimer diamonds are produced provides enough room for them to get pure natural faceting on both ends.

Geological Occurrence of Herkimer Diamonds

dolomitic rock in Cirque_de_Mourèze France — Dolomitic rock in Cirque_de_Mourèze France. Wikipedia.

As mentioned earlier, quartz is geologically formed in a host rock called Dolostone formations. And this is the case for Herkimer Diamonds as well. These rock formations came into existence nearly 500 million years ago with the cavities from where most of the Herkimer Diamonds are mined from.

Properties of Herkimer Diamonds

Most of the physical properties of Herkimer Diamonds are like any other quartz specimen and they also exhibit a smoky appearance. However, the Herkimer diamond often contains liquid hydrocarbon inclusions which are not found in other excavated quartz crystals. Besides that, carbon dioxide gets trapped in its crystalline structure.

Solid inclusions for Herkimer diamonds are the same as regular quartz crystals which include dolomite, sphalerite, and pyrite. Minute quartz particles are also present in some Herkimer diamond specimens. The specific gravity and hardness of Herkimer diamonds also got the same value as any regular quartz crystal.

Mining of Herkimer Diamonds

The mining of the Herkimer diamond on a large commercial scale is done rarely. In most cases, enthusiasts try to mine them on their own. Small-scale mining is also feasible because it doesn’t need extensive and excavation that can only be carried out through specialized machinery.

Let’s have a look at the prevalent methods employed by gemstone buffs to mine Herkimer diamonds.

Break and Find Mining

Enthusiasts find Dolostone rock formations and break them open with sledgehammers. Those who get lucky find some double-faceted quartz from the inside. It is important to note that Dolostone is not a soft rock specimen. Collectors have to work hard and long to smash these stones, which are also further reinforced because of the added layers of silica.

Scavenging

Many people just go on hunting expeditions in quartz mines to find these intriguing gems. Searching the rubble of broken-down rocks is another way by which many collectors have succeeded in acquiring some tiny specimens.

Mining after Cavity Prospecting

This is somewhat a commercial method employed by collectors to get to the large deposits of Herkimer diamonds. Large wedges and sledgehammers are used to drill through the quarry walls and floors to reach the Herkimer diamond-laden cavities present in Dolostone formations. This method is used to find the large deposits in a single mining location. One has to be extremely good with the use of tools for mining involved cavity prospecting.

An Ornamental Item

Fine Herkimer diamonds are not just confined to stone collections. They are also used as ornamental objects and can be used in a wide range of jewelry items. From bracelets to necklaces and earrings, they can fit into any jewelry piece since they are naturally found in many different shapes.

A good Mohs Hardness measurement also ensures that they provide better functionality as ornamental objects. This means these quartz crystals are resistant to scratching and other everyday abrasions. People who believe in metaphysical attributes of stones often possess Herkimer Diamonds for its different healing and mystical benefits. People who follow Chakra’s healing techniques also use this mineral for balancing the energies within the body.

Minerals

Pyrite: The Mineral Known as the Gold Imposter

October 11, 2018 HFM Leave a comment

”Pyrite in its natural form" — Photo by PiLens – yayimages.com

Human fascination with gold is as ancient as the civilization itself. Throughout the timeline of history, this bright and yellow mineral has always been considered a precious and prized commodity. Such was the appeal and requisition for the mineral that people even tried to produce synthetically. It is often said that the foundation of modern chemistry was laid down with the attempts of producing gold in labs.

Due to its prized stature, gold is also often used to carry out fraud, directly or indirectly. For instance, its imitations are often sold as original to rip off uninformed consumers as many naturally occurring minerals resemble gold.

Pyrite is one such example that bears a resemblance to gold in its naturally occurring and refined states. For that reason, it is also called fool’s gold since people who can’t tell gold and pyrite apart can easily be scammed by the latter as the expensive precious metal. In this article, we are going to discuss pyrite and the methods that can be used to tell it apart from gold.

Pyrite: A Sulfide Mineral

Pyrite is one of the most common sulfide minerals in nature. If one breaks down pyrite chemically, then a single molecule of pyrite is composed of one atom of iron and two sulfide ions. The natural form of pyrite displays a dull brass yellow color. However, it can be processed and furnished to give a bright metallic luster. This is the reason why it starts to look like a gold specimen, particularly to all those who are not expert in distinguishing different minerals.

Whether, it’s ingenious, sedimentary or metamorphic rock formations, small deposits of pyrite can be found in every geographic setting. This is the reason why pyrite is an inexpensive mineral and worth nothing when compared to gold. It is important to mention that some traces of original gold can be found in some naturally occurring pyrite deposits though, but never enough to consider this element to be worth anything of value.

Practical Uses of Pyrite

There are two notable practical uses of pyrite. Let’s take a look.

Pyrite as Sparking Material

Pyrite has been used as a sparking material for centuries. Sparking characteristic of the mineral is also the reason behind the name ‘pyrite’. The word is derived from a Greek word ‘pyre’, which means ‘fire’. With industrial processes getting modernized really fast, this use of pyrite has also been reduced. Nevertheless, it is still used in flintlock guns as a sparking material.

Production of Sulfur and Sulfuric Acid

These days, pyrite deposits are largely used to produce sulfur and sulfuric acid on a commercial level.

Use of Pyrite in Feng Shui Practice

Feng Shui is a thousands-year-old Chinese tradition of controlling the energies in the environment for a happier and content life. This ancient practice associates the energies emitting out of pyrite with wealth and abundance. The Feng Shui use of pyrite entails keeping it in the home as a decoration or wearing it in the form of a pedant.

Differentiating Gold and Fool’s Gold

Mineralogists often carry out destructive and non-destructive tests to distinguish apparently similar minerals. Several destructive and non-destructive tests are used to differentiate gold and pyrite. Destructive tests usually involve physical and chemical tests. Therefore, they are not used if there are strong chances that the given specimen is actual gold and not pyrite. Let’s have a look at all such tests used to tell the difference between actual gold and fool’s gold (pyrite).

Non-destructive tests

Color

The color of the naturally occurring specimen is another characteristic that can be used to tell gold and fool’s gold apart. Natural and unrefined gold specimen has bright yellow to golden tinge. In contrast, pyrite exhibits brassy tinge. Many naturally occurring gold specimens are often alloyed with silver deposits, giving the extracted piece a whitish yellow color.

Tarnish

Some minerals already have tarnish on their surface when they are found in nature. So, analyzing this feature can be used as one of the non-destructive tests. Naturally occurring gold flecks and lumps are usually untarnished and already bright. On the other hand, pyrite specimens often contain some sort of tarnish on their surface.

Shape

Gold and pyrite specimens can be differentiated on the basis of shape as well. However, this non-destructive test alone should not be used to differentiate the two because some of their naturally occurring crystalline specimens can exhibit a similar crystal habit. Otherwise, pyrite is usually found with angular edges, giving its specimen the shape of cube, pyritohedron or octahedron. In contrast, gold specimens are found in rounded shapes.

Striations

Many pyrites deposits are found with fine parallel striations on their surface. Striations are not present on gold.

Specific Gravity Test

The specific gravity (SC) of the pure gold specimen is 19.3 while pyrite has SC value of 5. Even the naturally occurring alloyed form of gold has specific gravity more than 5. So, this is another way to differentiate between gold and pyrite. Specific gravity is a simple lab test that can be carried out with a beaker and weighing machine.

Destructive Tests

Hardness

The hardness of both minerals is also considerably different from each other. Gold and fool’s gold have a hardness of 2.5 and 6.0 on the Mohs scale respectively. Copper has a Mohs hardness of 3.0. This means gold specimen can’t scratch copper. However, fool’s gold or pyrite can do that.

Streak Test

Streak test of minerals entails observing their color in finely powdered form. Gold streaks appear yellow, whereas fool’s gold exhibits greenish black tinge in its amorphous form.

Ductility

Gold is extremely ductile. It can easily be bent into shapes even with a pin or soft wooden stick. On the other hand, pyrite either resists or gets broken into pieces upon the application of pressure.

Sectility

Sectility is a physical property of any material to be cut into pieces. Gold has an extremely good value of sectility as compared to fool’s gold. This implies that even the small pieces of gold can be cut into additional pieces. However, small pyrite pieces can’t be further minimized.

Minerals

Beryl: A Lesser Known Gemstone

September 20, 2018 HFM Leave a comment

The beryl family of mineral has bestowed us with many gemstones. Some of them, such as emeralds and aquamarine, are widely known and sought-after. However, some lesser-known beryl stones are also mined throughout the world. Among them, the most striking is goshenite. This stone is usually found as a white and colorless specimen in nature. According to some mineralogists, goshenite is the most abundant beryl in nature. Chemically, it is the purest beryl stone.

However, the abundance of this mineral doesn’t mean that the each and every excavated specimen of the stone is worthy of being faceted into a gem. Jewelers usually prefer to facet only those goshenites into ornamental stones that are transparent and free of every impurity. It is important to mention that the goshenite is also considered the mother of crystals because of its pure existence in nature. The naturally occurring specimens of this crstal contains nearly no chemical impurities.

Goshenite is a Modern Gemstone

Unlike many gemstones that have been in human use for centuries, goshenite is comparatively a modern gemstone. People only came to know about this variant when it was discovered from a small mine in Massachusetts as slightly white and opaque during the 19th century. Soon after that, miners started to look for this gem in other geographical locations. Now, it is found in nearly every part of the world. However, the most notable goshenite mines are in South America and the gem-grade goshenite is mostly mined from Brazil.

The Name of the Stone

Since this mineral is a modern gemstone, no Greek or Latin etymologies are attributed to its name. The gemstone is named after the locality where it was first found. Goshen, a small town in Hampshire County, Massachusetts had a small area from where the first goshenite specimen was mined.

Goshenite and Similar Gemstones

Because of its transparent and whitish appearance, goshenite resembles many other minerals. For instance, it will be difficult to distinguish for a non-expert if a specimen is placed among white zircon, white sapphire, or white quartz.

Goshenite and Diamond

Some really fine and transparent pieces of this gemstone can also give the impression of a diamond. However, such specimens are really hard to find. Moreover, this rare mineral can be distinguished from diamonds by analyzing one definitive gem characteristic called fire.

Fire is a geological term for dispersion. It entails the ability of a gemstone to break down the light into a spectrum when exposed to a light source. The dispersion or firing capability of a diamond is second to none. One can easily tell diamond and goshenite specimens apart by observing them from different angles in an illuminated space. The diamond specimen would produce quick flashes on the exposure of light. On the other hand, goshenite stones can’t produce the same flickers in a similar setting.

One can also tell goshenite from diamonds specimens by conducting a hardness test. Goshenites are way softer than diamonds. Therefore, they can easily get scratched. Nevertheless, it can be used as an inexpensive alternative to diamonds in jewelry items. Many jewelers offer goshenite-laden necklaces, rings, and pendants. Amid all its use as an ornamental article, the greater demand for this gemstone is attributed to stone collectors.

Goshenite and Metaphysics

Two Hands Together — Hand Healing Energy

The metaphysical uses of minerals have been discussed several times in this section. There are many people who strongly believe in this branch of philosophy and subsequently use several everyday items in accordance with the principles of metaphysics. Like any other naturally occurring stone, there are many metaphysical uses of goshenite. It will be fitting to discuss some of them in this article.

Healing Energies of Goshenite

People who believe in healing energies of gemstones call goshenite as a crystal of the moon. All those stones associated with moons are believed to improve the balance of hormones and bodily fluids. Therefore, the stone is used by some to treat mood disorders stemming from postnatal depression, PMS and bipolar disorder.

Goshenite and Chakra Therapy

Chakra therapies are based on the ancient Sanskrit dogma that our physical and spiritual being is governed by seven wheels (chakras) of energy located at different positions on the body. Different gemstones are believed to activate these chakras to benefit the treated individual.

Goshenite is known to activate the Crown Chakra that is located at the top of the head. This chakra is believed to expand our understanding of the world beyond the existing reality. It is also known to provide a gateway to our beliefs, universal energy and truth. In short, the use of goshenite in Chakra therapies entails a peace of mind while providing more clarity regarding the surrounding universe. During Chakra therapies, goshenites are used with other stones to enhance their healing properties. In addition, it can also be used on any of the seven Chakras to clear and revitalize the given body area.

Goshenite as a Zodiac Stone

Like any other beryl stone, goshenite is considered a Zodiac stone for Taurus. However, it is deemed suitable for Cancerians as well. Due to its association with the moon, it is known for clamping down the predisposition of impulsively charging ahead.

Goshenite and Feng Shui

Feng Shui is an ancient Chinese practice of controlling the energies of the surroundings to create an optimal living environment. Mineral stones play an important role in controlling and managing the energies of a Feng Shui environment.

For instance, goshenite is associated with metal energy. This Feng Shui energy can be optimally harnessed in the west and northwestern portion of a residence or room. Metal elements, as described by Feng Shui, school of thought, fetch the attributes of determination and concentration in our lives and residential settings.

Feng Shui experts recommend the use of goshenite in the residential spaces used for any work of concentration or group tasks. It is believed that the presence of this stone in its surrounding helps in solidifying the determination and the efforts being made in a particular space.

Minerals

Eight Crystals that Can Help to Calm Your Mind and Improve Your Mood

September 19, 2018 HFM Leave a comment

Healing Crystal — Photo by tipota – yayimages.com

Crystals have been used as a mode of healing for centuries. Focusing on energies, crystals can help to dispel negativity, improve your mood, calm your mind and even bring prosperity into your life. In fact, many minerals are naturally found in the form of crystals so using them as is can give you more benefits.

Keep in mind that crystals are not a substitute for medical advice. However, they are used by people who believe that these minerals provide some sort of pain relief and improve their mind and mood. Many people also believe that some minerals also have different energies attached to them.

Following are some of the more popular ones that people use for mind and mood:

Amethyst

Also called the “All Purpose Stone,” the Amethyst is a beautiful, purple crystal that soothes the mind, relieves anxiety and reduces stress. It is available in various shades of purple, ranging from light lavender to a deep plum purple. The stone is said to connect with the Third Eye Chakra (Ajna) and the Crown Chakra (Sahasrara) in the body.

It is said that wearing amethyst can help to improve your immune system, help with insomnia and alleviate stress. It is also a great stone that brings more clarity to your mind when your thoughts are confused or foggy. For meditative use, the amethyst crystal is the best as it can help to bring contentment, peace and help one recover from grief and loss.

Amethyst is popular when worn as jewelry. It comes in many sizes and shapes and this beautiful stone may inspire you to go to the jewelry store and purchase a nice Amethyst necklace. Even if you don’t believe in its powers, it’s a lot cheaper than diamonds!

Black Tourmaline

One of the strongest healing stones, black tourmaline is thought to absorb negative energies and offer spiritual protection. Negative energy refers to the vibes you promote when you appear to be down because you are looking at a situation with a negative (pessimistic) attitude.

Black tourmaline is said to eliminate these negative vibrations, but it may also minimize the effect of electromagnetic fields or frequencies that are emitted from the gadgets and electronic objects in your home. If you are one of those concerned about the negative effects of cell phone waves in the air, perhaps acquiring this stone may make you feel better, even if it is just from a placebo perspective.

This mineral also helps aid in proper sleep. It is said to reduce stress and promote a calmer mind. Black tourmaline can be worn to keep your anxiety at bay and to help you feel more grounded. The crystal is also said to offer an aura of protection that keeps you feeling spiritually healthy and positive.

Rose Quartz

A pink colored stone, rose quartz is connected with love, harmony, and emotional stability. The crystal holds a reputation for being the best for soothing your heart and helping relationships blossom in a healthy manner. People claim that it is great for calming, dealing with emotional trouble or trauma and even past issues.

Wearing or holding it can bring emotional relief and keeping it in your home will fill it with harmony and love. Rose quartz is also said to help with emotional blockage, healing from emotional abuse as well as develop better relationships and friendships. There are reports that it can release anger, jealousy, and resentment of others, so if you are in a bad relationship right now, how about obtaining a rose quartz mineral and see what happens? It will also look great on your mantelpiece.

Citrine

A yellow colored stone, Citrine is the crystal of prosperity and plenty in all areas of life. Also known as the “Merchant Stone,” using or wearing citrine regularly can also improve your financial areas in life by removing blockages. It is also said to attract new and better opportunities in the professional life of a person.

Citrine is a crystal that makes one feel more creative, mentally invigorated and feel happier about life again. It is also said to improve focus and concentration, boosts energy and reduces stress associated with your personal and professional life. Wearing it or keeping it at your workplace can also improve the atmosphere around you.

Jade

With a deep green hue, jade can be great for calming your emotional energy and releases negativity. The stone symbolizes tranquility, purity and brings about more harmony to the person. Jade is said to be linked with the heart chakra and those who believe say it also enhances relationships and attracts more love into a person’s lives.

Jade is popular in jewelry and tends to be available in a range of different green hues, including emerald green or apple green with hints of yellow, red, brown and lavender or blue in it too. In rare instances, you can also find a white jade stone but the color does not always impact the healing powers of the stones.

Turquoise

A gorgeous vibrant blue stone and rare in most parts of the world, turquoise has been highly prized by different cultures, including the Ancient Egyptians, Native Americans, North and South Americans, and others. Apart from its distinctive blue colors, turquoise is said to make one happier and more outgoing.

Social anxiety can be reduced with the stone as it not only makes you more confident, it also influences other people around you. The shades of turquoise can range from an eye-catching aqua blue hue to a demure cerulean green tone.

This is probably a great stone to take with you when you go on a job interview, but don’t tell the interviewer you have on. He/She might not understand, unless they have read this article (smile) and with it said that it can manage social anxiety, those who routinely post on social networks should have one next to their computer or mobile device. Who knows? Maybe the social media world would become a little more friendlier!

Moonstone

Considered to be a personal stone with a feminine energy, the moonstone is a crystal which brings happiness, abundance, and improved relationships into one’s life. The stone is said to protect from negativity and can calm the mind with ease. It also relieves stress and anxiety.

Moonstone is also great for meditation as they say it makes the mind calmer, brings a better understanding of self and boosts your mental health. It is also a great stone for someone who is very sensitive to energies and can feel drained and depleted in social interactions with other people.

Blue Topaz

Known as the “Writer’s stone,” blue topaz is used as a crystal for clarity in thought and speech. The crystal is said to bring good fortune, joy, and abundance. As a stone that is used to improve communication, blue topaz is said to help with writer’s block and can even help one overcome anxiety related to public speaking.

The blue topaz is also said to have a soothing effect on the mind, reducing stress, eliminating anxiety and bringing more clarity to your thoughts. With better communication methods, you will ultimately be able to enjoy better relationships in all areas of your life.

The crystals mentioned here are all available in raw form or can be shaped to be worn as jewelry pieces, They no doubt will look pretty to wear, but even though many people may swear by their healing powers, there is not much scientific evidence to support these claims. If you have a desire to use them, always remember that these crystals are not a substitute for therapy or prescribed medication.

Minerals

Labradorite: A Feldspar with a Distinctive Optical Characteristic

December 8, 2017 HFM Leave a comment

by photosampler – yayimages.com

Labradorite belongs to a large group of silicate minerals, believed to make up more than half of the Earth’s crust, known by the name of feldspar. Labradorites are usually found in the igneous rock formations all around the world. Before discussing the wonderful optical characteristics associated with this stone, let’s delve into some of the details about its geographical occurrence.

Presence of Labradorite in the Nature

Labradorite can be found in different unique geographical settings. They are mostly formed through the process of metamorphism in which igneous rock of norite and basalt transforms into foliated rock formations. But they can also be found in sedimentary rock specimens that break away from the geological formations containing labradorites due to extreme environmental conditions.

Labradorescence: Exhibition of Schiller Effect From This Feldspar Specimen

Some of the labradorite specimens have the inherent ability to exhibit rare optical phenomenon of adularescence which is commonly known as Schiller effect. In this optical exhibition, stones glow with a sheen which is coming from the inside of the stone instead of its surface. Opal, agate and moonstone are the widely known gemstone or ornamental specimens which possess the property of adularescence.

However, this same phenomenon becomes very different altogether, and in a good sense, when it is observed in some of the labradorite stones. Because few specimens are so good with the Schiller effect that they simultaneously exhibit multiple colors from the inner layers of their structure. Due to this distinctive and strong demonstration of adularescence, this phenomenon has got its own name as “labradorescence”.

How Labradorescence occur?

We have already known that how adularescence works. Labradorescence also plays in the same way where light reflects back from the internal surfaces instead of the exterior of the stone but here more than one type of wavelengths are reflected back by the internal twinning layers of the stone which are seen in the form of different colors ( blue, orange, red, green) by the observers. Labradorites possess adularescence or labradorescence are considered gem-grade feldspar.

Famous Labradorite Mining Locations

There are geographical locations all around the world which are famous for the deposits of labradorite.

Labrador, Canada: Birthplace of Labradorite

These unique feldspar stones were discovered in the 17th century on the Isle of Paul, Labrador, Canada and hence named after the place which is a province of present day Canada.

Gray and Black Labradorite: Russia and Madagascar

Gray and black labradorites which exhibit fine labradorescence can be found in Russia and Madagascar. It is interesting to note that both of the countries are more than 6000 miles apart but still host the same variants of labradorites.

Spectacular Deposits in Finland

Labradorites with an exceptional exhibition of labradorescence are mined from rare deposits of feldspar in Finland. They even named by the local administration “spectrolite” because of their spectacular display of rare optical characteristics.

Oregon Sunstone: A National Labradorite Deposit

Labradorites are also mined in the US. However, they don’t possess the characteristics of labradorescence. Feldspar mines in the state of Oregon produces these stones different hues with a more transparent crystalline structure.

Labradorites mined in these sites are branded with the name of ‘Oregon sunstone’ and there is a reason to that. Many of the stone specimens found in this area contain metallic inclusions in the form of copper impurities. Due to this, these labradorites get the property of flashing with aventurescence in the presence of light. This specific property of Oregon labradorites compensates the absence of labradorescence. It is in great demand due to its popularity among local jewelry dealers and tourists.

Labradorite: As a Gemstone and Décor Material

Labradorites with strong exhibition of Schiller effect are usually cut into gem-grade sizes of stones. They have a Mohs Hardness of around 6, making them more suitable for jewelry items that are less exposed to abrasion. To cherish the labradorescence of the stones, they are cut into cabochons. These cabochons are cut in a way where their base is corresponding to the inner twinning layers producing adularescence flashes.

Some large specimens of the stone can be cut into slabs which then can be employed in the making of small sculptures and other decor articles.