Amethyst from Boudi, Morocco
Fabrizio Troilo, Abdelghani El Harfi, Salahaddine Mouaddib, Erica Bittarello, and Emanuele Costa, 四月 30, 2015
An introduction to Moroccan amethyst, which features distinctive color zoning and inclusions.
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紫水晶质石髓
James E. Shigley and John I. Koivula, 十二月 1, 1985
对“Damsonite”，一种新型石髓的商品名，进行分析和说明。
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