トラピッチェのようなブラジル産アメシスト (英語)

続きを読む

Gemstones and Sustainable Development Knowledge Hub

Projects developed by the GemHub to benefit miners, cutters, and others involved in the gem and jewelry industry.

続きを読む

IAC Conference on Responsible Gold

Gold: Vortex, Virtues, and Values was hosted by Initiatives in Art and Culture (IAC) at Bohemian National Hall in New York City, April 12–13. Now in its eighth year, the conference has become an annual industry gathering for those looking to evaluate the market, discover exceptional work, and discuss key gold-related issues.

続きを読む

Twelve-Rayed Star Sapphire from Thailand

A black star sapphire produced from eastern Thailand, showing both golden and silver rays, is studied at GIA’s Bangkok lab.

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