Chatoyant vivid blue Brazilian tourmaline is examined in the Bangkok lab.

Held October 21 and 22 at Cinema Row, the Chicago Responsible Jewelry Conference drew 200 attendees who heard industry experts discuss safe, sustainable, ethical gem production and jewelry design.

Reveals the internal features and spectroscopic data of these small natural pearls and offers the means of separating them from pearls of related mollusk species.

Summarizes data collected by GIA on more than 90,000 natural diamonds in this color range and presents their gemological and spectroscopic properties.

In recent months, sapphires treated under heat and pressure have been documented in the trade.

Garnets have been known since antiquity. However, it was only during the late nineteenth century that the green variety demantoid—named for its “diamond-like” luster—was discovered in the Ural Mountains of Russia.

イラスト入りの新しい宝石ガイドは、小規模の採掘職人が自ら採鉱した宝石の品質と分類について詳しく学ぶのに役立ちます。

World-class fancy colored diamonds and truly historic jewels highlighted the 2018 auctions, but total jewelry sales were down from 2017.

マリー・アントワネットの宝飾品の10点が、11月14日に行われたサザビーズのジュネーブオークションで王室のその他の宝石90点と共に驚異的な価格で落札されました。

大切な方に贈るギフトをお探しですか？12月の誕生石は、その方が12月生まれでなくても、すべての方の好み、スタイル、個性にピッタリ合ったギフトとなります。

A recap of the Futurescape Forum panel from GIA’s 2018 International Gemological Symposium.