FeatureGems & Gemology, Fall 2015, Vol. 51, No. 3Colombian Trapiche Emeralds: Recent Advances in Understanding Their Formation (英語)Isabella Pignatelli, Gaston Giuliani, Daniel Ohnenstetter, Giovanna Agrosì, Sandrine Mathieu, Christophe Morlot と Yannick Branquet11月 22, 2015PDFをダウンロード
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