A brittle pyro-electric mineral, occurring in crystals, also massive, compact, and columnar, originally obtained from Ceylon (Sri Lanka); a…
| 单词 | θ215594 |
| 释义 | society > occupation and work > materials > raw material > gem or precious stone > tourmaline > [noun] (6) tourmaline1825 A brittle pyro-electric mineral, occurring in crystals, also massive, compact, and columnar, originally obtained from Ceylon (Sri Lanka); a… Subcategories:— varieties of (5) |
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