From Longman Dictionary of Contemporary Englishonyxon‧yx /ˈɒnɪks $ ˈɑː-/ noun [uncountable] DCJHEa stone with lines of different colours in it, often used in jewellery
Examples from the Corpus
onyx• Augle took that easily with his big onyx blaster.• Madeleine pushed a green onyx ashtray within his reach.• He ruminated on the idea and nervously plucked a cigarette from the green onyx box beside the telephone.• Sumerian gem-cutters also took advantage to a limited degree of another way of exploiting the banded structure of onyx.• He had stopped her as she was walking solemnly round the small onyx coffee tables, among the guests.• It means that I need a stone as good as the onyx.• The onyx was shipped to Tijuana to be fabricated into bookends, chessmen and other tourist kitsch.• The pink speckled beans looked like tiny onyx eggs.Origin onyx (1200-1300) Old French Latin, from Greek, “claw, nail” 