Heritage Auctions’ Upcoming Fine Jewelry Sale: What Caught Our Eye This Time
You will often see auction previews here in the Roskin Gem News Report. We love to highlight the High Jewelry, Magnificent Jewels and Royal...
GIA and Gübelin Gem Lab: Ethiopia Confirmed as a New Source of Paraiba Tourmaline
It's official!
Ethiopia is a new source for paraiba tourmaline.
GIA and the Gübelin Gem Lab have now independently confirmed that Ethiopia is the world's fourth...
Ethiopia’s Paraiba Rush: Haimanot Sisay’s First-Hand Field Report in IGR
We've looked at the laboratory reports. Now, here's a look at what's actually happening at the mine.
Ethiopian gemologist Haimanot Sisay traveled to the new...
AGTA Updates Its Gemstone Information Manual and Code of Ethics – It’s More Than...
New enhancement symbols, updated treatment and care guidance— and a change in terminology for synthetic gemstones
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There's more to the American Gem Trade Association's newly...
Van Cleef & Arpels Diamond Necklace Stolen: 41 Hammer Blows to the Glass —...
Queen Nazli of Egypt's historic Van Cleef & Arpels diamond necklacehas been stolen from the MAK in Vienna— just weeks before the museum's “Glanzstücke”...
Stone-Faced Watches: Time Is Set in Stone
On the face of it, there's nothing terribly unusual about a watch dial.
But face the facts. Watchmakers have been getting a little stone-faced lately.
Aventurine,...
Canada Falls, Synthetics Rise, and the Diamond Market Splits in Two: Jon Phillips and...
"It’s been a tough few years in the natural diamond market," notes Jon Phillips, "seriously challenged by synthetics, lower demand and shrinking supply."
"How will...
Gems on Mars? Rubies, Opals and the Hottest New Gem from Jezero Crater
Martian Rocks: Corundum. Chromium. Opal. Chalcedony. Quartz. And now natural glass formed by meteorite impacts.
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'Very Unexpected'NASA Rover Zapped a Rock on Mars And Found...
In Memoriam: Manuel Marcial de Gomar: How One Gem Defined a Life
Manuel Marcial de GomarSeptember 13, 1935 — July 23, 2026
The emerald community lost one of its longtime ambassadors on July 23 with the passing...
United States Patent Office: Process for the Manufacture of Artificial Pearls
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We continue with our ongoing series of gem-related patents dating back more than a century,uncovered and shared by William “Bill” D. Hoefer Jr., GG...
GIA and Gübelin Gem Lab Confirm New Source of Copper-Bearing Tourmaline from Ethiopia
Independent research documents material from newly reported source of paraíba tourmaline
Press ReleaseCARLSBAD, Calif. and LUCERNE, Switzerland – August 27, 2026 –
Researchers at GIA (Gemological...
OBJECTIVE DIAMOND CLARITY GRADING: We Think We’re Being Subjective, but Our Brain is Doing...
Diamond clarity grading has always been considered subjective. An experienced grader looks at a diamond and says, “That looks like a solid SI₁ to...
