Roskin Gem News Report

AGA Press Release The Accredited Gemologists Association (AGA) is proud to announce Kerry Gregory as the inaugural recipient of the Alan Hodgkinson Medal, a prestigious award established to honor individuals...

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 for only eleven minutes. When they...

Mention South African mining and most of us immediately think of diamonds and gold. The country that gave us the Kimberley Mine, the Cullinan diamond and the Witwatersrand goldfields...

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 an exhibition of contemporary headpieces...

The international gemological community has lost one of its great educators, researchers, and pioneers with the passing of Professor Mimi Ou Yang Chiu Mei, founder of the Hong Kong...

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 several weeks creating this masterpiece. Tap...

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 sapphire-and-diamond pendant watch, to a...

"We are seeing oiled stones outside of emerald every single day in the lab, and yet there is so little awareness about it in the market." – E Billie...

Some exhibitions open, close, and quietly disappear. Others continue to evolve. L'ÉCOLE, School of Jewelry Arts, supported by Van Cleef & Arpels, has spent the past several years taking one of...

For decades, gemstone pricing guides have operated on a simple assumption... If enough material exists in the marketplace, researchers can observe transactions, compare qualities, and establish pricing across a...

TRADE ALERTSSEF - the Swiss Gemmological Laboratory SSEF Issues Trade Alert After Identifying Re-Filled EmeraldsAccompanied by Earlier "No or Minor Enhancement" Reports Picture this: An emerald with oil- or resin-filled fissures is...

This time, Billie Hughes gives us something rarely seen: a before-and-after-and-after-again look at what happens to an inclusion during heat treatment. As gemologists, we are always looking for clues of...

Designing American Jewelry by Ellie Thompson An inspirational book about a jeweler's journey that helped shape her designs. The Hardness of Emerald by Ron Ringsrud Ron Ringsrud's life journey in Colombia for...

Mention South African mining and most of us immediately think of diamonds and gold. The country that gave us the Kimberley Mine, the Cullinan diamond and the Witwatersrand goldfields...

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 at the Baloda-Belmundi Diamond Block...

For decades, diamond grading reports have documented a stone's color, clarity, carat weight, and proportions. Yet anyone who has spent time comparing diamonds knows that two stones with identical...

The Accredited Gemologists Association (AGA) hosts a dedicated virtual event focused on the diamond market and gemology. The conference—"Colors of the Diamond Market"—provides insights into diamond valuation, natural and synthetic...

Fashionably late has a whole new meaning. For more than a century, jewelers have been pulling off one of high jewelry's most elegant tricks: hiding the watch. Long before smartphones...

Sotheby’s May 12th sale of High Jewelry in Geneva presented the usual wide range of rare gemstones and collectible signed jewels. Headlining the sale was this 6.03-carat Fancy Vivid...

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 sapphire-and-diamond pendant watch, to a...

Christie's Hong Kong Magnificent Jewels auction brought together many of the ingredients collectors typically chase: a Fancy Vivid Pink diamond by Bvlgari, a nearly 14-carat Kashmir sapphire, exceptional natural...

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 - 9th, at the Mandarin Oriental....

Sotheby’s May 12th sale of High Jewelry in Geneva presented the usual wide range of rare gemstones and collectible signed jewels. Headlining the sale was this 6.03-carat Fancy Vivid...

For centuries, the famous Hortensia Diamond has existed as an historical object behind museum glass at the Louvre — a softly colored pink diamond tied to French royal history,...

The numbers reached from Christie’s Geneva auction during Luxury Week were impressive to say the least. Beyond the headline-grabbing sale of “The Ocean Dream” — the amazing 5.50-carat Fancy...

A chance discovery in a Berkeley antique shop became an eight-decade provenance investigation—showing how research can become the most valuable part of a piece of jewelry. What would you do...

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 an exhibition of contemporary headpieces...

Argyle Pink Diamonds™ and West Australian Ballet are delighted to announceIsabella Triscari as their Rare Gem for 2026.The second year of a unique program, the Rare Gems partnership supportsthe talented dancers from the...

While Geneva auction houses continue to showcase extraordinary natural diamonds, Kashmir sapphires, Burmese rubies, and important signed high jewelry, another upcoming auction reminds us that provenance itself can become...

The 2026 Met Gala turned into a full-scale showcase of men’s high jewelry moments. Black tuxedos became the perfect backdrop for seriously jaw-dropping pieces.  Among the standout jewels was Elsa...

The Jewels, The Tributes, The Legacy April 21, 2026, marked what would have been the 100th birthday of Queen Elizabeth II, one of the most recognized figures of the modern...