After writing last Thursday's blog, I got curious about green diamonds. I don’t recall ever seeing one. This might be because they make up less than 0.1% of all fancy-colored diamonds on earth. After red, green diamonds are the 2nd rarest diamonds. Unlike most diamonds that get their colors from chemical impurities entering their atomic structure, green diamonds get their color from natural radiation. Over millions of years, alpha and beta rays emitted by radioactive minerals knock carbon atoms out of place in the crystal structure, changing how the stone absorbs light. In other words, radiation exposure creates carbon atom vacancies. This vacancy defect, also known as the GR1 center in a diamond, causes the green color.
According to Only National Diamonds, radiation from alpha particles usually only penetrates a few micrometers deep, leaving a shallow green "skin" on rough stones. Diamond cutters must plan and facet the gem with expert precision to evenly distribute this color throughout the stone. It may explain why we see more radiant cuts in this fancy colored gemstone. The radiant cut’s faceting maximizes light reflection, which intensifies and saturates the color of the stone, making it appear more vivid.
A very few green diamonds are also colored by more complex defects involving nitrogen, hydrogen, or nickel.
The world’s natural green diamonds come from South America and Africa. Nowadays, laboratory irradiation can also produce green diamonds. It’s challenging to tell natural-grown and lab-grown green diamonds apart. Both are real diamonds.
The scarcity of green diamonds makes them very pricey. Color is the most important of the diamond Cs (followed by cut, carat, and clarity) in determining value. As their color becomes more saturated and vibrant, prices rise dramatically. Based on their GIA color intensity grade for a 1-carat stone, a Fancy Green color costs from $50,000 - $100,000; a Fancy Intense Green costs between $150,000 - $200,000, and a Fancy Vivid Green costs $300,000+.
The Dresden Green, a 41-carat diamond originating from India’s Golconda mines, is the largest and most famous natural green diamond in the world. It is a chemically pure IIa diamond with VS1 clarity. Frederick Augustus II, Elector of Saxony and King of Poland, paid 400,000 thalers for the diamond in 1741. Perhaps someone should have told Diespach, the court jeweler of Saxony, that fads come and go before, in 1768, he mounted the Dresden Green as an elaborate hat ornament surrounded by 411 white diamonds.😁 Today, it is on display in the Green Vault at Dresden Castle in Germany. The renowned green diamond survived the Seven Years’ War, the Napoleonic Wars, World Wars I and II, its confiscation by the Soviets, who returned it to Dresden in 1958, and the 2019 Dresden Museum heist of royal jewels. Thankfully, at the time of the theft, the Dresden Green was on loan to the Metropolitan Museum in Manhattan.
The Aurora Green (👆top image) is a 5.02 carat Fancy Vivid Green rectangular radiant cut diamond with VS2 clarity. The Aurora Green is surrounded by pink diamonds set in a ring. Found in Brazil, it sold for a wooping $16.8 million, the most expensive price ever paid for a green diamond, at Christie’s Hong Kong in 2016. Chow Tai Fook Jewellery bought it. Without fluorescence, its color is one of a kind!
Personally, I’d rather pay less money to get a bigger, more common white (clear) diamond. Other jewelry lovers may covet uniqueness over size.
Ultra-rare fancy-colored diamonds are so wildly expensive that customers fork over a ton of moola for a tiny stone, so I wouldn’t buy, but visit them at Tiffany’s New York flagship store or the museums around the world that house them. First a dreamer, then a realist ... and maybe an adventurous traveler who explores cultures and history is the way to get more bang for your buck!💚
