Is “Onyx” a Scrabble word?
Yes
ONYX
Valid in at least one Scrabble dictionary
Valid in these dictionaries
SOWPODS / CSW
Scrabble UK & International
TWL / NWL
Scrabble North America
Large English Dictionary
General English word list
Meaning of Onyx
/ˈɒnɪks/
noun
1.A banded variety of chalcedony, a cryptocrystalline form of quartz.
2.A jet-black color, named after the gemstone.
3.Any of various lycaenid butterflies of the genus Horaga.
adjective
1.Jet-black