首页 > Term: corundum
corundum
The earth alumina, as found native in a crystalline state, including sapphire, which is the fine blue variety; the oriental ruby, or red sapphire; the oriental amethyst, or purple sapphire; and adamantine spar, the hair-brown variety. It is the hardest substance found native, next to the diamond.
- 词性: noun
- 行业/领域: 语言
- 类别 字典
- Company: MICRA Inc.
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- spencer12
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(Germany)