A silky lustre in some rubies and sapphires, due to microscopic crystals, and considered a defect.
| 单词 | θ215568 |
| 释义 | society > occupation and work > materials > raw material > gem or precious stone > corundum gemstones > [noun] > defect in (1) silk1886 A silky lustre in some rubies and sapphires, due to microscopic crystals, and considered a defect. |
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