onyx
English Thesaurus
1. a chalcedony with alternating black and white bands; used in making cameos (noun.substance)
| hypernym | : | calcedony, chalcedony, |
| definition | : | a milky or greyish translucent to transparent quartz (noun.substance) |
| hyponym | : | sardonyx, |
| definition | : | an onyx characterized by parallel layers of sard and a different colored mineral (noun.substance) |
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