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四大重要宝石的检验

对史密森尼博物馆藏品中几颗颇具历史意义的著名宝石进行了检验和报告。

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Figure 9. The parcel of rough spinel on the left, reportedly from Tajikistan, contains pieces weighing up to 48.5 g. The seven faceted spinels on the right (9.04–28.16 ct) were fashioned from some of this rough.
产自塔吉克斯坦的紫粉红色尖晶石:切磨前后

产自塔吉克斯坦的紫粉红色尖晶石:切磨前后

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