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中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Alexandrite

Alexandrite（矿物名）

BeAl2O4

BeAl₂O₄

This sample of Alexandrite is displayed in the Smithsonian Museum of Natural History. Alexandrite is an oxide mineral of beryllium with the composition BeAl2O4. It is the name given to a gem-quality variety of chrysoberyl. This gem at left is 17.08 carats and is named the Whitney Alexandrite. It is from Hematita, Minas Gerais, Brazil and is regarded as one of the finest Alexandrite gems. The crystal is a rare twinned crystal of Alexandrite. It is from the same location and of similar material. It is shown at the same scale.

这个 Alexandrite 样本陈列在史密森尼自然历史博物馆中。Alexandrite 是一种含铍的氧化物矿物，化学式为 BeAl₂O₄。它是一种称为金绿石的宝石品种的名称。左边的这颗宝石重17.08克拉，称为 Whitney Alexandrite。它来自巴西米纳斯吉拉斯州的 Hematita，被认为是 finest 的 Alexandrite 宝石之一。该晶体是一种罕见的孪生晶体。它来自同一地点，材质相似。它以相同的比例展示。

Mindat: Alexandrite

Mindat: 钻石石英
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