Roskin Gem News Report

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 and will also appear in...

2026 Celebrity Gemologist Interview featuring Christopher Smith of American Gemological LaboratoriesTuesday, August 18, 2026, 10am PDT NEW DATE TO BE ANNOUNCED Christopher P. Smith, President and Chief Gemologist of American Gemological...

Just when many in the gem trade thought theyfinally understood the last round of U.S. tariffs...the tariffs have changed again. Gary RoskinRoskin Gem News Report Over the past couple of weeks,...

The 23rd Australian Opal Exhibition: August 5 & 6, 2026, is all set - register NOW! Held at Southport Sharks, Gold Coast Only Two Weeks to Go! ◈ Wednesday 5 August 2026...

The Canadian Gemmological Association (CGA) announces the extension of the deadline to submit your design entries. New Deadline – Friday, July 31, 2026. Students can now submit their designs by Friday,...

Just when many in the gem trade thought theyfinally understood the last round of U.S. tariffs...the tariffs have changed again. Gary RoskinRoskin Gem News Report Over the past couple of weeks,...

The 23rd Australian Opal Exhibition: August 5 & 6, 2026, is all set - register NOW! Held at Southport Sharks, Gold Coast Only Two Weeks to Go! ◈ Wednesday 5 August 2026...

"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...

For the past two+ years, the headlines have come quickly. A $39 billion takeover bid for Anglo American by BHP. Anglo American puts De Beers up for sale.Diamond production cuts....

This summer, Van Cleef & Arpels reminds us how "ordinary" gem materials can be transformed into extraordinary jewels. Lapis lazuli. Turquoise. Coral. Black onyx. Malachite. Chrysoprase. Sometimes the magic...

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 and will also appear in...

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...

Nine months after one of the most brazen museum jewelry thefts in modern history, two of the men accused of carrying out the October 2025 robbery at the Louvre...

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,...

2026 Celebrity Gemologist Interview featuring Christopher Smith of American Gemological LaboratoriesTuesday, August 18, 2026, 10am PDT NEW DATE TO BE ANNOUNCED Christopher P. Smith, President and Chief Gemologist of American Gemological...

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...