Records from a Luxurious Past: Gem Inventory of a Seventeenth-Century Armenian Merchant
Analyzes a 1688 probate inventory of Gregorio di Girach-Mirman’s extensive gemstone collection to highlight the global reach and influence of Armenian merchants in the early modern luxury trade.
Transparent Staurolite
A rare transparent dark red-brown freeform step-cut staurolite is examined in the Carlsbad laboratory.
Cartier and Myths Exhibition at Rome’s Capitoline Museums
An exploration of the Cartier and Myths exhibit, examining how Cartier jewelry engages with classical antiquity, mythology, and artistic traditions.
Historical Reading List: Ruby and Balas Ruby (Spinel)
Historical Reading List: Persian Turquoise
Historical Reading List: Peridot from Egypt
Historical Reading List: Tourmaline and other Gem Minerals from Southern California
Enumerating Diamond Cuts
Historical Reading List: Tourmaline and other Gem Minerals from Maine
The Transformation of Diamond Cut Quality Grading: Where Are We Now?
GIA researchers trace the history and transformation of diamond cut grading, highlighting scientific breakthroughs that are reshaping how cut quality, brilliance, and visual performance are evaluated.
Now Enrolling – New GIA London Campus Opening this Fall
The soon-to-open GIA campus in London is now enrolling students for classes beginning in August 2026.
GIA、ダイヤモンドの産地追跡ブロックチェーン・プラットフォーム「Tracr」の株式30％を取得
GIAは2026年1月1日、デザインを一新したカラーストーンレポートと新サービスを開始します。
GIA Acquires 30% Shareholding in Diamond Provenance Blockchain Platform Tracr
John Cowley Joins GIA as Chief Financial Officer
ジョン・カウリーがGIAの最高財務責任者に就任
GIA、台湾に新キャンパスを開設