A look at the gem ornamentation of this landmark, as well as the jewels of the Mughal dynasty.

A systematic study of the properties of approximately 500 Fancy white and 1,200 Fancy black diamonds.

Characterization of an intense yellowish green faceted diamond revealed a complex treatment process.

Determines methods for maximizing production and quality of cultured half-pearls.

Examines a new rhodochrosite simulant composed of pressed gibbsite and calcite powder.

Reveals the process for hydrothermal enhancement of amber and the means of detection.

Research topics covering diamonds and colored stones were presented at the annual meeting of the Geological Society of America in Phoenix, Arizona.

Fine merelaniite whiskers discovered in gem-quality yellow-green diopside crystals.

このジュエリーの画像コレクションは、金属加工の技法が宝石やジュエリーのデザインをいかに引き立てるかを紹介しています。

Annotated reading lists compiled on Pearls from the Sea of Cortez in Mexico

GIAの卒業生が、宝石・宝飾業界で辿った様々なキャリアパスを紹介し、学生達にアドバイスを提供します。

GIAの研究員が、稀少で美しいピンクダイヤモンドがどのように形成され、その色がどのように生じたかをよりよく理解するために9万以上もの天然ピンクダイヤモンドを分析しました。

米国のホリデー商戦の売上高予測は良好に見えます。サザビーズの香港オークションでは、GIAの卒業生の作品が出品されます。

U.S. holiday sales predictions look good. Sotheby’s Hong Kong auction features GIA alumna pieces.

CARLSBAD, Calif. – Oct. 16, 2019 – Building on a successful pilot and feedback from small-scale colored gemstone miners in Tanzania, GIA will expand distribution of its innovative gem guide for artisanal miners to other communities and countries in Africa.

CARLSBAD, Calif. – Oct. 16, 2019 – Building on a successful pilot and feedback from small-scale colored gemstone miners in Tanzania, GIA will expand distribution of its innovative gem guide for artisanal miners to other communities and countries in Africa.

イダー＝オーバーシュタインの宝石細工の伝統に関して編集された注釈付きの書籍リスト

米国の消費者信頼感は、経済が不況に陥るのを防ぎました。

U.S. consumer confidence has kept the economy from sliding into a possible recession.

大胆な大小のフラッシュ効果を示したり、極小の煌めきを素早く放つ軽やかなダンス。