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Gem Localities and Formation

Figure 1. Cobalt-blue gem spinel from Baffin Island, Nunavut,...

Diamond Identification

Figure 1. The canary yellow diamonds from this study showed m...

New Technologies and Techniques

Figure 1. Single-crystal CVD diamond. Courtesy of Element Six...

What Country Do My Diamonds and Other Gemstones Come From?

Dr. James Shigley, GIA Distinguished Research Fellow, giving ...

G&G Announces Most Valuable Article Awards

A matched pair of Kashmir sapphires, approximately 7 carats t...

Spring 2020 G&G Available Now

After being delayed by the global pandemic, the Spring 2020 e...

The Stories Behind the Photos: A Gigantic Aquamarine and ‘G

The tools of a traveling field photographer include a map, no...

GIA’s Knowledge Sessions: A New Way to Share Gemological In

Robert Weldon talked about this photo during the Behind the S...