GemGuide Updates Old European Diamond Prices
GemGuide has updated its Old European-cut diamond prices, decreasing them across all sizes. The revised prices are available now in the GemGuide Pricing App...
Musée Lalique Robbery: $5 Million Heist Targets René Lalique Masterpieces
French museum confirms one of its signature Art Nouveau jewels among 27 works stolen during an eleven-minute robbery.
The thieves were inside the Musée Lalique...
Tiaras Fit for a Queen… Created for an Exhibition
When Her Majesty Queen Mary recently visited Gavnø Castle in Denmark, she wasn't there to admire the Danish Crown Jewels.
Instead, she came to explore...
In Memoriam: Professor Mimi Ou Yang (1933–2026)
The international gemological community has lost one of its great educators, researchers, and pioneers with the passing of Professor Mimi Ou Yang Chiu Mei,...
A Munsteiner Cut – Unheated Tanzanite
Philipp Munsteiner - Unheated Tanzanite - Munsteiner Cut
This magnificent gem weighs 122.50 carats.
The original weight of the rough was 75 grams (375 carats).
Philipp spent...
Sotheby’s New York Fine Watches Auction — A Quick Peek
The mid-June New York Fine Watches auction at Sotheby's featured several gem-set timepieces that caught our attention, from a demantoid-encrusted brooch watch, an ultra-thin...
India is Still Looking for Diamonds – and Found 5! (Don’t get too excited)
Two hundred tonnes of rock and sediment. Five rough diamonds. Just 1.22 carats.
5, but really only 2This was the result of recent bulk-sample testing...
When Price Becomes Secondary to Availability: Why GemGuide Changed the Way it Prices Burmese...
For decades, gemstone pricing guides have operated on a simple assumption... If enough material exists in the marketplace, researchers can observe transactions, compare qualities,...
Four Watches and a Cartier Desk Clock: Beyond Sotheby’s Jewelry Case
Taking a short break from the traditional gem-set jewels, we took a look through Sotheby's Geneva Fine Watches auction catalogue, held May 7th -...
Scott Sucher and the Hortensia: French Crown Jewel Replica Cut in “Grown Diamond”
For centuries, the famous Hortensia Diamond has existed as an historical object behind museum glass at the Louvre — a softly colored pink diamond...
The Big Ones Keep on Coming: Letšeng Recovers Two More 100+ Carat Diamonds
They did it again.
The Letšeng Diamond Mine in Lesotho has recovered two more 100+ carat diamonds — a 100.71-carat Type I faint yellow diamond...
Rubies on Mars? The Science is Exciting. The Gemological Evidence is Still a Little...
A recent article in Scientific American suggested that NASA rovers may have found traces of minerals on Mars related to rubies, sapphires, opals, and...
