Established in 1931, GIA is an independent nonprofit that protects the gem and jewelry buying public through research, education and laboratory services.

GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe. Each precious stone page features additional detailed gemological …

One of the most sought-after gemology credentials, the GIA Graduate Gemologist® (GG) Diploma Program is an in-depth, hands-on immersion into the world of diamonds and colored …

Gem Identification. Practice identifying more than 60 species of gemstones, including naturals, synthetics, and treated. Start Sample. View Course Details

GIA ensures accurate gemological measurements across its global laboratories through rigorous metrology practices, including systematic instrument calibration, validation from traceable …

Elevate your career in gems and jewelry by combining passion with knowledge. Study at the Gemological Institute of America, the world’s foremost authority in gemology, and earn a …

The GIA Memo Creator makes it easier than ever to submit your gems to GIA for grading and analysis. The GIA Memo Creator connects directly to your client portal account, so your …

Established in 1931, the Gemological Institute of America (GIA) is the world’s foremost authority on diamonds, colored stones, and pearls. A public benefit, nonprofit institute, GIA is the …

With Report Check, you can quickly and conveniently confirm that the information on your report matches what is archived in the GIA report database. Stay up-to-date on current laboratory …

Collecting gems from known geographic localities is of tremendous importance to the GIA research program. By collecting samples in the field, we have a much better understanding of …