Mineralogy. Used as a general name for all the precious transparent varieties of native crystalline alumina, including the ruby. A colourless…
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| 释义 | society > occupation and work > materials > raw material > gem or precious stone > corundum gemstones > [noun] (25) sapphire1668 Mineralogy. Used as a general name for all the precious transparent varieties of native crystalline alumina, including the ruby. A colourless… telesia1801 Any of the precious stones consisting of crystallized alumina, including sapphire and ruby. Subcategories:— defect in (1) — sapphire (11) — ruby (7) — others (4) |
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