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.

Chronicles the history of this cultural landmark, originally assembled for the Prussian king between 1701 and 1714, and its reconstruction by the Soviet Union starting in 1979.

Provides a visual guide to the internal features of natural, synthetic, and treated diamonds.

Examines the color origin of color-change diaspore, known commercially as Zultanite, and compare the effectiveness of the chromophores it shares in common with corundum.

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.

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。

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。

自然は秋になると、鮮やかなパレットのように変わる木の葉の色や万華鏡のように色鮮やかな素晴らしい夕日を見せてくれます。

Part 2 of 5 in the series: Value Factors, Design, and Cut Quality of Colored Gemstones (Non-Diamond). This article establishes a common language for discussing cutting styles, with a focus on basic faceting styles, and offers a short discussion on cabochons and beads