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One of the largest blue diamonds ever found ‒ weighing in at 122.53 carats ‒ was unveiled this week by Petra Diamonds; De Beers held the line on prices at the June 10-13 sight, which totaled about $650 million.

真に傑作と呼ぶにふさわしい、世界でも最高級のジェダイトの彫刻をデザインし制作することに打ち込んでいる名匠達の作業場を訪れました。

Take a behind-the-scenes look at some of the gems, minerals and jewelry on display at GIA in New York.

モゴックの宝石市場とカッティング産業の内部視察。

GIAフィールドジェモロジストのシニアマネージャーを務めるVincent Pardieuと、GIA教育フィールドジェモロジストのマネージャーを務めるAndrew Lucasは、宝石学フィールドワークを遂行するために共同作業しています。

Fossilized gastropod shells, trademarked for use in jewelry, are exhibited at the 2014 Tucson gem shows.

Stunning examples of gem cutting and design from the GJX Show in Tucson, Arizona.

Documents a series of visits to Myanmar in search of exceptionally bright pinkish red spinels possessing no dark tones.

Presents the gemological and spectroscopic properties of a suite of synthetic diamonds grown by AOTC using high pressure and high temperature.

G&G starts 2014 with renewed anticipation and the strongest intention to build on the many notable innovations that shaped the journal in previous years.

Deep blue fluorescence in a CVD synthetic diamond mimic patterns found in natural specimens.

Advances in CVD growth technology have resulted in crystals that yield well-proportioned round brilliant cuts.