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. It’s unlawful to sell lab-grown diamonds without transparency.
The scarcity of green diamonds makes them very pricey. Just like other colored gemstones, color is the most important of the fancy 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 GIA-rated Fancy Green 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 perhaps an adventurous traveler is the way to get more bang for your buck!💚
Diamonds over 2 carats increase in price exponentially, not linearly, because eye-clean, bigger diamonds are rarer and in demand. The jewelry industry uses the term magic sizes to describe the price jump at round numbers that occur at .05, 1.00, 2.00, 3.00 carats and up. If you buy a natural diamond ring slightly below the round numbers, for example, at 2.95 carats, you’ll pay less but get the same effect as a 3.00 carat diamond ring.
Nowadays, people who desire bigger carats are considering lab-grown diamonds for at least 50% less than the cost of natural diamonds of the same size and quality. Lab-grown diamonds are real diamonds. Just like natural-grown diamonds, lab-grown diamonds are pure carbon arranged in a crystal lattice. They have the exact same chemical, physical, and optical properties as natural diamonds. The difference between the two is their origins. Natural diamonds are created over billions of years in the earth, while lab-grown diamonds are created in weeks in a laboratory using advanced technology that mimics the natural geological process of diamond formation.
Do you want to know how lab diamonds are created? Two methods are used: High Pressure High Temperature (HPHT), which mimics the Earth’s mantle, and Chemical Vapor Deposition (CVD), which uses carbon-rich gas to grow diamond crystals atom by atom. Both methods produce 100% real diamonds. HPHT produces high-quality, often larger crystals and intensely colored diamonds with strong, consistent crystals, while CVD offers greater control, producing exceptional clarity and larger, high-quality, colorless stones such as pure type 2a (IIa) diamonds (i.e. diamonds without metallic inclusions, which are very, very rare in natural diamonds). Only an expert with a spectroscopy in a laboratory can tell a natural diamond and a lab diamond apart. Natural diamonds usually contain small amounts of nitrogen gas that become incorporated into the diamond structure. UV light (fluorescence) can highlight the growth structure of the diamond being tested. Lab-grown diamonds can also be identified by the types of inclusions they might show. CVD, HPHT, and natural diamonds will all have their own distinctive inclusions. Type 2a diamonds produced by the CVD method are the most chemically pure type of diamond, containing no measurable nitrogen, boron, or metallic impurities. They have exceptional transparency and brilliance, comprising less than 2% of gem-quality diamonds. Of course, that would add to their expense.
Often, you pay 50%-70% less for lab-grown diamonds, which usually have better color (D-F) and clarity (VS1) than natural diamonds. In other words, customers get a bigger, cleaner stone for less money. More sparkle! Natural diamonds fetch a higher resale value. But jewelry isn’t an investment, and you should only think of it as a luxury buy, since you’ll usually lose money by selling your jewelry.
Lab-grown diamonds are lowering the price of both natural and lab diamonds as more retailers enter the market and more people buy them.
Michael Gabriels, a 3rd-generation New York jeweler at 46 Howard Street in Soho specializes in lab-grown diamond jewelry with stellar craftsmanship, beautiful design, and good reviews for attentive customer service. Good craftsmanship is vital. You want to buy excellent cut diamonds. In a tennis bracelet or necklace, you want all the diamonds to have matching color and clarity. With regular promotions, you can also score a deal.
Lab-grown diamond jewelry isn’t cheap, but it’s sustainable and considered a better value because you can get more carats and better color and clarity for a lot less moola! No longer must customers spend 5-figures to buy a bigger or cleaner carat diamond ring, bracelet, or pair of earrings!
