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埃塞俄比亚蛋白石中的闪光和火焰 (英语)
Chatoyancy, rarely seen in play-of-color opal, is observed in Ethiopian material.
GIA发现覆合钻石
Analysis of a diamond graded Fancy blue revealed a CVD synthetic overgrowth on natural diamond.
针对产自 Baw Mar 矿(缅甸摩谷)的蓝色蓝宝石的深入宝石学研究
GIA 实地宝石学家在 2013 年、2014 年和 2015 年考察过 Baw Mar 的运营。 在本次研究中,我们分析了在两个独立考察期间收集的样本。
Atypical “Beading” in the Production of Cultured Pearls from Australian Pinctada maxima
In 2011, the authors began to see cases of low-quality natural pearls being used as unconventional “beads” for cultured nacre growth.

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