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Blue HPHT Synthetic Diamond Over 10 Carats

Terry Poon and Wuyi Wang, January 27, 2017

Results from GIA’s recent testing of a 10.08 ct blue HPHT synthetic diamond, the largest HPHT synthetic recorded to date.

Article

Large HPHT-Grown Synthetic Diamonds Examined in GIA’s Hong Kong Laboratory

Ping Yu Poon, Shun Yan Wong and Carmen Lo, March 16, 2015

Examination of the largest HPHT synthetic diamonds GIA has examined so far demonstrated significant progress in this growth technology.

Article

Exhibition Review: Treasures and Talismans: Rings from the Griffin Collection

Jennifer-Lynn Archuleta

A review of Treasures and Talismans: Rings from the Griffin Collection at the Cloisters in New York.

Article

Exhibition Review: Maker & Muse, Women and Early 20th Century Art Jewelry

Heidi Harders, June 24, 2015

A review of the “Maker & Muse, Women and Early 20th Century Art Jewelry” exhibition at Chicago’s Driehaus Museum.

Article

Update on the Rock Creek Sapphire Deposit

Warren Boyd, June 17, 2015

An overview of recently expanded sapphire production at the Gem Mountain mine near Philipsburg, Montana.

Spring 1991 G&G Lab Notes

March 1, 1991

This section, from the Spring 1991 issue of Gems & Gemmology, is a compilation of interesting finds from GIA’s laboratories.