More than 80% of the gemstones currently being traded in the market are either enhanced or treated in one form or another.  To understand the difference between untreated and treated gemstones, we will first need to understand the implications between the two.

Untreated gemstones are those that are not altered or enhanced in any way. They remain in the same form as when they were extracted from the earth. These gemstones remain in their original form and only get polished and cut to be used as jewelry accessories.  

Types of Treatment

Listed below are just some examples of the various treatments a gemstone is made to undergo.

Heating

The stone is exposed to high temperatures to enhance its clarity and alter the color. The most common gemstones that undergo this treatment are Zircon, Topaz, Sapphire, Ruby, Tanzanite, Aquamarine, and some others. Heating is a practice that is widely accepted in the gem market.

Oiling

Rubies and emerald are one of the most commonly oiled gemstones. Other gemstones that undergo oiling are Demantoid Garnet and Alexandrite. Oiling makes the surface more smooth and reduces any visible incisions.

Irradiation

Stones are exposed to varying degrees of controlled radiation to alter their color. Diamond, topaz, pearl, and quartz are common examples of gemstones that undergo radiation.

Dyeing

The fractures of a precious stone are exposed to colored dyes. To check whether a stone is dyed or not, you can perform a simple test at home using acetone. Pearl, Lapis Lazuli, Jade, and Quartz are some examples of commonly dyed gemstones.

Bleaching

A stone is bleached when it’s exposed to a certain chemical to change i.e. reduce or slightly alter the color of a precious gem. Tiger’s Eyes, Pearl, and Jade are some examples of stones that are bleached to reduce their color.

Why Gemstones are Treated

• Treated gemstones are cheaper. This is one of the biggest advantages of a treated gemstone. Most people want to buy or wear an emerald but since an emerald costs $50K per carat (untreated), most people cannot afford it. The solution is a treated emerald that starts at $10 per carat and can go up to $10K per carat.
• Treated gemstones are more available than natural gemstones. Untreated gemstones, especially of a larger size, are a very rare find. For example, an untreated diamond that is above 5 carats would cost millions of dollars and extremely hard to find as no one would be willing to sell that on the open market. Treated diamonds are available everywhere in most sizes.
• Rapid changes in fashion and general trends. A new outfit calls for a new piece of jewelry to go with it.

Advantages of an Untreated Gemstone

• Treated gemstones are less durable. The heat treatment, which is a widely accepted and practiced process, leaves the surface of the stone more brittle. After a certain amount of time, the straightened edges of the stone become chipped and fall in value.
• Irradiated gemstones might be harmful to some. Irradiated stones are exposed to radioactive materials such as beryllium which is harmful to health.
• Treated gemstones do not have a rigid price. New ways of treatment are being introduced to the market every day. As new methods come out, gemstones treated using old methods fall in value quite drastically. One of the best examples is the case of the Yellow Sapphire, whose price crashed in the 90s when newly treated gemstones were introduced which had superior qualities.
• Treated gemstones are unnatural. Mother Nature has a fixed supply of gemstones in her crust. This limited supply is what contributes to the high prices that natural gems can fetch. The market is flooded with treated gems; hence, they are valued as such.

The Global Market

Now that most of the world has been mapped and explored precious minerals, gem dealers and gemologists alike have a grasp on what stones to classify as rare.

Although new mines are discovered, the overall supply remains unaffected. This was not always the case as diamonds were extremely rare a few centuries ago, and could only be afforded by royalty and the very wealthy individuals.

When the large deposits in Africa were discovered to be overflowing with diamonds, the major companies dealing in these stones knew it spelled doom. They realized that if these stones were sold in unrestrained quantities in the open market, the price would plunge. At the time, diamonds were still not common in the open market and a cartel was formed to restrict the flow of diamonds. The flow is still controlled by the same cartel to this day.

In contrast to diamonds, other precious stones in their natural state are extremely uncommon. The natural stones keep getting more expensive with the passage of time as more people realize their true worth.

Final Thoughts

Whether they shine, luster or sparkle, gemstones have been held in high regards ever since they were first discovered. When the first gemstones were discovered there were no treatments available and hence natural stones had no substitute.  

Natural stones have a value that goes far beyond what the eye can see. If, however, appearance is your only concern, then you might opt for a cheaper treated stone. Keep in mind that synthetic jewelry and treated stones will never have the same allure and uniqueness that is found in real gemstones.

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“A diamond is forever”— this is the marketing tagline introduced by the famous gem company De Beers some six decades ago to promote the sales of its diamonds. However, it’s safe to say that this is not just a regular promotional overstatement. The never-ending fad and infatuation associated with diamonds bear out the hyperbole of this statement.  

To shed some more light on the human’s fixation with this colorless brilliant gemstone, we are going to discuss the most expensive diamonds that have ever been sold in auctions around the world.

1) Magnificent Oval Diamond

This absolutely colorless diamond is more expensive than any variant of the same cut and carat with slight color undertones. Gemological Institute of America (GIA) classifies the color of diamonds on a scale which starts from the D and ends at Z. D grading signifies a pure colorless diamond.

The Magnificent Oval Diamond sold in an auction held in Hong Kong in October 2013 was a D-graded specimen with an enormous weight of over 118 carats. It is important to mention that the original uncut Magnificent Oval was around 300 carats and there are very few above-100-carat colorless diamonds in the market.  Magnificent Oval succeeded in fetching a great price because it was the first such stone from Asia. It was sold at $31 million.

2) Sweet Josephine

On November 11, 2015, in an auction center in Geneva, Switzerland, a father brought a fancy colored diamond for his daughter for just $28.69 million dollars. The father was Joseph Lau, one of the richest men of Hong Kong with the track record of buying expensive fancy diamonds for his children. Lau made the highest bid for this diamond so he could gift it to his seven-year-old daughter Josephine.

This diamond’s weight is slightly more than 16-carat. The diamond has a strong undertone of vivid pink, giving its luminosity a unique characteristic. After winning the bid, Lou named the diamond ‘Sweet Josephine’.  Needless to say, seven-year-old Josephine was probably more thrilled to have a Bobby Doll than and $28.69 million dollar diamond, but if she gives it to Bobby, that would be the most expensive doll in the world. Either way, it is a win-win for them!

3) The Zoe Diamond

Bunny Mellon was a famous American horticulturist, gardener, philanthropist, and art collector. In the auction of some of her belongings after her death in 2014, a 9.75-carat diamond was sold at the double price of its initial estimates. The vivid blue diamond was purchased by a private collector for a whopping $32.6 million who named it ‘The Zoe Diamond’.

4) The Orange

In yet another auction held in Geneva, a diamond with heavy orange tones set the record for having the highest per carat price tag for any colored stone. This fancy vivid orange diamond weighed 14.2 carats and fetched the price of $32 million.

This colored diamond also succeeded in getting that huge bid due to its provenance. The stone originally belonged to the early 20th century Bolivians industrialist Simon Iturri Patino. He was one of the wealthiest men of the time and also known as ‘the Andean Rockefeller’.

5) The Princie Diamond

The Princie Diamond is one of the largest known intense pink diamonds in the entire world. It’s named ‘Princie’ because of its princely origin. This 34.65-carat heavy diamond originally belonged to Hyderabad, the princely state of pre-Partition India. It is believed that this precious gemstone was mined from an ancient mine in India.

The Princie Diamond was sold at $39.3 million in 2013 in New York, making it one of the most expensive pink diamonds. It is interesting to note that the Princie Diamond couldn’t fetch the estimated bid of $45 million.

6) Blue Moon of Josephine

This is another colored diamond that was auctioned on November 11, 2015, and also bought by Joseph Lau for his daughter. This stone was a magnificent piece of the fancy vivid blue exhibition with a weight of 12.03 carat. Lau made the bid of $48.6 million for the stone to outdo all the collectors in the auction.

Like Sweet Josephine, this diamond was also named by Lau after his daughter. As per some reports, Blue Moon of Josephine was actually a 29.62 carat uncut stone that was faceted in the long and exhaustive process spanning six months. Maybe Josephine should get a second Barbie doll?

7) Winston Pink Legacy

This pink beauty was sold at auction in Geneva in November last year. This 18.89 diamond with an intense pink color exhibition got the successful bid of $50 million. This diamond succeeded in getting that incredible bid because it had become an obsession of Nayla Hayek, the newly appointed CEO of Harry Winston.

Harry Winston Inc. is an elite jewel company based out of Switzerland that only deals in luxury gemstones and Hayek plans on acquiring all the famous and large gemstone from around the world.  Winston Legacy Diamond was originally owned by the family that was once at the helm of De Beers Group of Companies.

8) Oppenheimer Blue

This fancy vivid blue diamond weighing 14.62-carat was also once the property of Oppenheimer, the family that managed De Beers.  So, the diamond was aptly named after its owner Sir Philip Oppenheimer. Besides having an alluring origin, this diamond is also rare due to its unique emerald-like cut and chromatic exhibition. Oppenheimer Blue was sold at $56.8 million during an auction in Geneva in May 2016.

9) CTF Pink Star

This is the most expensive diamond ever sold in any auction in modern times. Weighing at tremendous 132.5-carat, this vivid pink blue diamond was the largest flawless color diamond specimen graded by GIA.  The stone was originally called Steinmetz Pink. Steinmetz was the firm that acquires the rough cut of this pink diamond from South Africa and faceted into its current shape.

In April 2017, the stone was bought by the famous Hong Kong conglomerate Choi Tai Fook that deals in real estate, hotels, and departmental stores as well as jewelry. After making a successful bid, the stone was named after the acronym of the company.

These whopping auction bids clearly indicate that the human fascination with diamonds hasn’t waned a bit and nor is it going to come down any time soon.

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Humans always have had a strong belief in the metaphysical powers of precious stones especially diamonds. People own and wear them to change their lives, their fates and their relationships for the better. There is an entire school of thought based on a principle that gemstones have strong healing properties for both mental and physical health. Mostly, only fortunate outcomes are attributed to gems.

Beauty can be a gift and a curse—and that we can say about diamonds. There are many of those precious gemstones that have a dark and spookier side. If we delve into past chronicles, we can find several diamonds that were believed to be cursed. The owners and wielders of these stones have met some ill-fated ends. In this article, we are going to discuss some of the most famous cursed diamonds from the archives of history.

The Hope Diamond

“The Hope diamond”by Arenamontanus is licensed under CC BY-NC 2.0

In the list of cursed stones, no other diamond has gained more notoriety than the hope diamond. This 45-carat gem with blue undertone has been around for at least four centuries with an unknown first owner. There is a long index of tragedies and mishaps for which the Hope Diamond has been blamed.

From insanity to murders and suicide, the hope diamond has brought the excessive of calamities for its owners and their loved ones. The most famous ‘victims’ of the hope diamond were King Louis XVI of France and Marie Antoinette. The couple owned the Hope Diamond during the infamous French turmoil and subsequent revolution. Louis XVI was the owner of the Hope Diamond at the time of his beheading.

Evalyn McLean, an American Socialite from the early 20th century was the last private owner of this cursed diamond. McLean had to go through a series of tragedies during her ownership of the stone—her husband left for another woman, her son died in a car crash and her daughter committed suicide.

Famous American Jeweler Harry Winston bought the stone from a Mclean’ estate trustee after her death and eventually sold it to Smithsonian, a museum and a research institute in Washington DC. To this day, it is the property of the museum and anybody can see that cursed stone that has been blamed to cast its evil spell on its owners throughout history.

The Koh-I-Noor

“He who owns this diamond will own the world, but will also know all its misfortunes. Only God or a woman can wear it with impunity.” These chilling words were said about the infamous 109-carat Koh-I-Noor diamond, originally mined some 5,000 years ago. The stone has a bloodied past marred with battles between entire monarchs.  

The stone was passed out among Persians, Indians, and Afghans as they would overpower each other in wars. The stone was eventually shifted to Britain and the Royal Family when the East India Company defeated the Sikh Emperor in India, the owner of the stone at that point in time.

The British were well-aware of the jinx and evil associated with the male ownership of Koh-I-Noor and how it had brought down the empires. Therefore, Queen Victoria wrote in her will that the stone must only be worn by a female royalty.

The Koh-I-Noor is now a part of the Crown Jewels. Iran, India, and Afghanistan still argue that they are the rightful owner of this cursed diamond.

The Black Orlov

It is the curse story of a black diamond that was once the eye of a statue of Hindu God Brahma.  It was stolen by an unknown miscreant somewhere in the 19th century. From then on, this black diamond has remained a cursed stone. It is believed that the priest of the temple put a vicious curse on the owner of the stone.

Before the Bolshevik Revolution, a Russian princess Nadia Vyegin Orlov was the owner of this black diamond. The princess committed suicide by jumping off the balcony while the stone was still part of her pendant. The stone then unknowingly found its way into the hands of an American diamond dealer J.W. Paris. Paris also took his life by jumping off a building, in an uncannily similar manner as Princess Orlov’s suicide.

The stone is now in the private ownership of a Pennsylvania-based ornament dealer Dennis Petimezas. He strongly contests that the curse of the Black Orlov has been broken. It is interesting to note the many owners have cut the stone into new shapes to ward off its curse. The original black diamond was over 190 carats and now it has been tapered to just 67 carats. However, the frequent ownership shift suggests that the curse hasn’t been broken yet.

The Regent Diamond

The Regent Diamond was another cursed stone with its origin in India. It was mined from the Goloconda Mine, located in Hyderabad, India. Shortly after its excavation, it was stolen by a slave who then boarded a ship to France to sell it and to start a new life.

He hid the stone in his leg wound to protect it from getting stolen or snatched. Whether due to stone’s curse or something else, the ship’s captain found out about it. The captain had the slave killed and went on to sell it for himself.

The stone eventually ended up in one of Napoleon’s swords. Many people believe that the possession of the Regent Diamond was the starting point of Napoleon’s decline. The Regent Diamond is now on display at the famous French museum the Lourve.

The Sancy Diamond

The Sancy diamond is a 55-carat crystal with yellow undertones. A French soldier acquired the stone from India and sold it to a British royalty who wore it as a good luck charm. The stone is believed to be cursed because of its frequent disappearance all through history.

One time, the diamond went missing and eventually found its way in the stomach of a messenger who died of unknown circumstances. This stone is now also part of the jewel collection in the Louvre alongside the Regent Diamond.  

From a scientific standpoint, it’s just a superstition to believe in the curse of diamonds. But there is no denying that the owners of these cursed diamonds had to go through some ill-fated instances. Coincidence?  

With its diverse, vibrant colors and captivating patterns, this precious stone is a perfect match for earrings, bracelets, necklaces, and watches. Opal is amorphous which means it does not have a pre-defined crystalline structure. This sets it apart from other gemstones and it is this property of opal that is the reason for the stone coming in many different colors and a range of shapes.

The article below talks about some interesting facts about opal. Some of these might surprise you.

1)   Opal Goes Way Back

Writers, artists, and craftsmen have held the opal in high regard since olden times. The exact discovery of the gemstone is not known as records vary. However, artifacts containing traces of the gemstone date as far as 4000 BC. The Romans referred to opal as opalus which means precious stone.

2)   All Good Things Take Time and Patience  

According to most prominent researchers on gemstones, silica (which forms a base component of opal) overran parts of Australia approximately 20 to 30 million years ago. With time, through millions of years, silica solidified between rocks and canyons to form opal. According to some research, it takes about five million years to solidify a single centimeter of opal.

3)   A Gemstone Formed by Rain

The exact process involved in the birth of opal is still not clear. However, most experts believe that heavy rains washed the silica into canyons and cracks, initiating its creation. As the water was evaporated, only the silica was left behind in gel form, eventually hardening over millions of years. This theory is arguably the most valid one. Giving credence to this is the fact that opal contains significant traces of water ranging between 5 to 20%.

4)   Australia is the Main Source of Mining

Australia holds a market monopoly in the supply of opal to the world. Australian mines provide over 95% of the world’s supply of opal. Other countries known for notable quantities are Brazil, Mexico, and Ethiopia.

5)   A Play on Color: Precious Opals and Commons Ones

As with most other gems, opal comes in two main categories – precious and common. Precious opals come in popping colors such as a fiery red or they mimic a slew of colors that are pleasing to the eyes. This is referred to as a play of color and is used to classify unique opals that have various colors blended to form a beautiful precious rock. Some opals, like blue ones, have veins running through them, which makes this gem unique among its own family, as no one opal is the same.

6)   How Do Opals Get Their Various Colors?

Expensive opals have two color themes; one is the background color that is formed due to impurities contained within silica. The other colors come to be due to the way silica hardens into a crystalline form. Silica consists of minuscule spheres that merge. During their fusion, small gaps are formed between these spheres where light is diffracted. This phenomenon caused by light diffraction is responsible for the shapes and color play of opal.

7)   Intensity and Diversity Drive the Price

Intense-colored opals along with those that have the most vibrant diversity of colors are priced the highest.

8)   A Gemstone That is Soft

The Mohs Scale ranks gemstones and precious rocks according to hardness density. Opal ranges between 5.5 and 6.5 on this scale. This implies that they require more caution as compared to other gemstones and birthstones as they are more brittle.

9)   Superstitions and Bad Luck

A superstition among people regarding the purchase of opal is that it brings bad luck to people. It’s also believed that the only people shielded from such effects were those whose birthstone is opal. Countless tales of opals being damaged or destroyed have fueled this superstition. A major reason behind the superstition existing is due to the stone’s fragile nature.

10) Opal as an Official Birthstone

The National Association of Jewelers agreed in 1912 to enshrine Opal’s position as the official birthstone of October. Opal has been said to be used as an official birthstone for October since the 15th Century.

11) Extraterrestrial Stone

Opal is the second gemstone to be found in outer space. It was discovered on Mars in July 2015 by a NASA orbiter.

12) Types of Opals

As mentioned earlier, opal comes in various colors and shapes. Each color has its own special traits and unique combinations. Opals are mostly found in purple, blue, red, orange or yellow. Black opals are treated as the most exclusive gemstone, though they too come in different shades of black.

13) Treatment of Opal

Most gemstones are treated to bring out their inner beauty and luster. Opals are mostly left in their natural state except a few that require darkening.

14) A Stone with All the Colors of a Rainbow

Silicon that had seeped through the cracks in boulders and formed into opal over time usually depicts all the colors of a rainbow within one stone. This is one of the most unique properties of opal and a wonder of nature.