Color Sold Well in Tucson — Now Comes the Real Test: Insights from Gemworld...
It was the second day of the AGTA’s Tucson GemFair — and the opening day of the DYNAMIC Seminar Series.
As tradition would have it,...
Photomicrography: Images from Within by Sammantha Maclachlan
The stunning photomicrographs (images taken using magnification to see details in or on gem materials) are simply amazing.
And here is another one for you,...
Gem-A’s GemIntro: A Practical Entry Point Into Gemmology
Gem-A’s GemIntroA Practical Entry Point Into GemmologyOpening the Door to Deeper Knowledge and Lifelong Discovery
Every so often, someone asks me, “Where should I start...
Gemological Science has lost a Champion: George Rossman, PhD, 1944–2026
In Memoriam
George Rossman, PhD, 1944–2026, Professor of Mineralogy, Emeritus,California Institute of Technology , died on Friday, February 6, 2026. He was 81 years old.
On...
Inside the War Room: How AGTA Took Its Tariff Case to Washington
On day two of the AGTA DYNAMIC Seminar Series, AGTA President Bruce Bridges and CEO John Ford did not step up with prepared remarks....
Scoping It Out: Photomicrography from Melissa Scarani
Here we have a 0.25 ct. round brilliant cut diamond with an extraordinary garnet crystal. Melissa not only captures the crystal beautifully, she manages...
CIBJO issues Warning: “Non-authorized Individuals Fraudulently Presenting Themselves as CIBJO Representatives”
CIBJO, the World Jewellery Confederation, has issued an urgent warning to the global jewelry trade after learning that individuals are falsely claiming to represent...
Too Much Chromium? When Red Gems Stop Glowing
For generations, gemologists and jewelers have been taught a simple rule: chromium makes red gems beautiful. It is the element behind the glow of...
“Synthetic Gems #1” – GemQuest presents Dr. Arya Akhavan
Ray Hill and Dr. Clemens Swarzinger invite you to attend "Synthetic Gems #1", presented by "one of the world's leading experts on the topic,...
The 1869 Patent for “New Manufacture of Artificially Formed Mineral Carbon”
In our last newsletter, we began what appears to be an ongoing series of gem-related patents dating back more than a century, uncovered and...
Gem-A’s Photographer of the Year Competition! And the Winners are ….
Each autumn, Gem-A receives submissions for this contest, not just from Gem-A students, alumni and members, but from colleagues and peers around the world....
In Memoriam: George Peter “Pete” Yantzer
George Peter “Pete” YantzerNovember 10, 1948 - January 10, 2026
George Peter “Pete” Yantzer, a respected gemologist and influential figure in modern diamond grading, passed...
