In Memoriam: Heitor Barbosa

続きを読む

More on Virtu Gem’s Ethical Supply Chain Practices

An update on Virtu Gem’s mission to improve artisanal mining and gem trading practices in Kenya, Malawi, and Zambia.

続きを読む

Trapiche Garnet from Vietnam

A rare occurrence of 14 trapiche patterns is observed in a garnet sample from Vietnam.

続きを読む

A Unique Omphacite Jade Pendant

続きを読む

37th International Gemmological Conference

A report from the 37th IGC, held in late October 2023 in Tokyo.

続きを読む

Fall 2023 Auction Highlights

Large blue and pink diamonds were among the top lots of the fall auction season, including the most expensive auction jewel of 2023.

続きを読む

G&G Contributors Awarded for Best Geoscience Research

続きを読む

こちらもご覧ください

YMAL GIA Ed
通学やオンラインでの教育について学ぶ
Learn About NextGem
GIA ネクストジェム(NextGem) ダイヤモンド研修 小売業向け
Explore GIA Laboratory Promotional Offers
GIAラボラトリーの特別オファーを見る
Shop the GIA Store
GIAストアで ショッピング