An amorphous form of hydrated silica resembling chalcedony, often white or colourless (common opal), but varying through blue-green and orange…
| 单词 | θ215648 |
| 释义 | society > occupation and work > materials > raw material > gem or precious stone > opal > [noun] (30) opala1398 An amorphous form of hydrated silica resembling chalcedony, often white or colourless (common opal), but varying through blue-green and orange… pederote1585 A kind of opal. stone1895 Australian. Opal or opal-bearing material; an opal; to be on stone, to have struck opal stone. Also New Zealand (see quot. 1965). opalite1896 Opal; any of various varieties of this. Also: (in gemmology) an artificial mineral resembling opal. knobby1910 Australian. A black opal occurring as a nodule coated with sandstone or opal dirt; = nobby, n.4 Subcategories:— varieties of (25) |
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