Research Article Search Results
合成ダイヤモンドの特徴 (英語)
Presents a visual guide to the growth processes and major gemological spectroscopic features of synthetic diamonds.
モンタナ州のYogo（ヨゴ）渓谷から産出されたサファイアの宝石学的な特徴 (英語)
A look at the mining and distinguishing characteristics of this naturally vibrant blue sapphire.
Outlook on Opals from Mexico and Australia (英語)
Jürgen Schütz discussed the opal sourcing and cutting activities of the German firm Emil Weis.
Update from the Responsible Jewellery Council (英語)
The Responsible Jewellery Council (RJC) has announced plans to include colored stones and silver in the next revision cycle for its Code of Practices, which RJC members are certified against.
宝石の巨匠: Drehers家と素晴らしい彫刻 (英語)
A look at the artistic heritage of the Drehers, an influential family of gem carvers in Idar-Oberstein, Germany.
オーストラリア東部のアコヤ真珠養殖業 (英語)
Characterizes the akoya cultured pearls produced on the eastern shoreline of Australia using native Pinctada imbricate fucata mollusks.
Flashes and Flames in Ethiopian Opal (英語)
Chatoyancy, rarely seen in play-of-color opal, is observed in Ethiopian material.
天然ダイヤモンドにオーバーグロースした合成ダイヤモンド
Analysis of a diamond graded Fancy blue revealed a CVD synthetic overgrowth on natural diamond.
Trapiche-Type Sapphire from Tasmania (英語)
A rare Tasmanian trapiche-type sapphire, found during a field expedition, is examined.
A New Deposit of Gem-Quality Grandidierite in Madagascar (英語)
Reviews the properties of exceptionally pure grandidierite from a new source.
Sapphires from the Sutara Placer in the Russian Far East (英語)
Studies the formation and chemical composition of the largely unexamined alluvial sapphires from Russia’s Jewish Autonomous District.
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