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...
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...
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,...
GIA and the Science of Origin Determination: The Research Behind the Report
AGTA's DYNAMIC Seminar with Dr. James Shigley, Dr. Aaron Palke, and Wim VertriestGIA's Team Discusses What it Takes to offer a Country of Origin...
Tariffs Are Spinning — AGTA Keeps Its Eye on the Real Goal
If you’re feeling a little dizzy trying to follow the latest tariff developments, you’re not alone.
First came the country-by-country tariffs President Trump imposed under...
Australian Opal Centre (AOC) Announces 2026 Australian Opal Tour
The Australian Opal Centre (AOC) has announced the return of its Australian Opal Tour, scheduled for September 22–30, 2026—a nine-day journey covering more than...
Tariff Turnaround! U.S. Supreme Court Says Tariff Authority Belongs to Congress
After reading through 170 pages of the Supreme Court’s opinion, titled: LEARNING RESOURCES, INC., v. TRUMP, PRESIDENT OF THE UNITED STATES, here is the...
Pezzottaite: From the Ground to the Vault — A Rare Beryl Revisited
Discovered in Madagascar in the late 1990s, pezzottaite was initially mistaken for pink tourmaline or morganite (pink beryl) before laboratory testing revealed it to...
AGTA Spectrum and Cutting Edge Awards — The IMAGES: We now have them all...
The American Gem Trade Association has graciously shared the professional images by Jeff Mason of Jeff Mason Photography, capturing every winning entry from the...
GIA to Update Colored Gemstone Reports: More Country-of-Origin Gems on the List
GIA, the Gemological Institute of America, will launch redesigned colored stone reports and new services on January 1, 2026. The new reports will feature...
Into the Stone: Photomicrography from E. Billie Hughes
"One of the beauties of working with gemstones is that each time you peer into a stone, you get a glimpse of the universe...
