
青金石的历史与知识
Historians believe the link between humans and lapis lazuli stretches back more than 6,500 years.

橄榄石品质要素






祖母绿品质要素


锂紫玉的历史与知识
Kunzite is a relative newcomer to the array of colored stones available for use in jewelry.
Abstracts; Fall 1991
本文摘自《宝石与宝石学》(Gems & Gemology) 1991 年秋季刊,是《宝石与宝石学》(Gems & Gemology) 外部发表的重要宝石学相关文章的摘要汇编。

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