Sotheby’s To Sell 555 Carat Black Diamond, Largest Cut Stone Ever Auctioned By Annie Davidson | January 18, 2022 It’s not often you have a chance to own a Guinness World Records diamond, considered the largest cut stone in the … Continue reading →
Largest gold nugget found in Alaska sells for $750,000 to lead Heritage Nature & Science Auction One of the largest specimens ever found in the Western Hemisphere December 13, 2021 Article first published on Southern Jewelry News (DALLAS) – The … Continue reading →
RJC Developing Standard For Lab-Grown Materials News from JCKOnline.com In our earlier article, What Is The Difference Between Lab vs. Natural Diamonds? we talked about how to distinguish between the two types of diamonds, but until today there has been … Continue reading →
Blue Diamonds Have a Surprising Deep Origin and a Link to Ancient Oceans This is an extended abstract of the article ‘Blue boron-bearing diamonds from Earth’s lower mantle,’ published in the journal Nature. GIA Research Scientist Evan Smith is the … Continue reading →
Three Birthstones for August According to the American Gem Society, August is one of three birth months represented by three different gemstones. In 2016, August joined June and December as one of the three birth months represented by three different … Continue reading →
Scientists Just Created a New “Glass” That’s Tougher Than Diamond It could create bulletproof windows that’s 20 to 100 times tougher than current versions. Source material By Chris Young Aug 10, 2021 (Updated: Aug 10, 2021 15:58 EDT) A team … Continue reading →
Russia Seeks to Quadruple Alexandrite Production Alexandrite is often called ’emerald by day and ruby by night.’ ALEXANDRITE IS ONE of the rarest and most expensive gemstones on the planet. During an average year, worldwide production is barely 40 kilograms … Continue reading →
39-Carat Blue Diamond Found In Africa CLASSIFIED AS “EXCEPTIONAL” for both its color and clarity, a 39.34-carat blue diamond recently recovered at the celebrated Cullinan mine in South Africa is likely to yield upwards of $1 million per carat when … Continue reading →
What is likely the third largest piece of gem-quality rough ever unearthed—weighing 1,098 cts.—was recently unearthed at the Jwaneng mine in Botswana. Article courtesy of JCK contributor Rob Bates So far, the only gemstones found that are bigger are the … Continue reading →
Purplish-Pink Diamond Sets Auction Record At Christie’s Source: JCKOnline.com On May 23, the 15.81 ct. Sakura diamond fetched $29.3 million at Christie’s Magnificent Jewels auction in Hong Kong, setting a world-record auction price for a purple-pink diamond. That makes it … Continue reading →
