| plasma(noun, jewelry) | |
| sard(noun, jewelry) | |
| semiprecious stone | |
| slate(adjective, dark, pitch, black, murky) | |
| somber(adjective, black) | |
| stone | |
| achromatic | |
| agates | |
| balais | |
| banded gemstone | |
| bare | |
| black gemstone | |
| black stone | |
| bleak | |
| brunet(adjective, black) | |
| carnelian | |
| cat's eye(expression, idiom, jewelry) | |
| chrysolite | |
| cinereal(heather, charcoal, starless) | |
| clouded(adjective, black) |
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| APA | Smart Define. (2015). onyx thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/onyx/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "onyx thesaurus" https://smartdefine.org/onyx/thesaurus/synonyms (accessed September 23, 2026). |
| Harvard | Smart Define 2015, onyx thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/onyx/thesaurus/synonyms>. |
| MLA | Smart Define. "onyx thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/onyx/thesaurus/synonyms> |