Is “Sardonyx” a Scrabble word?
Yes
SARDONYX
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 Sardonyx
noun
1.A gemstone having bands of red sard; a variety of onyx or chalcedony.
2.A tincture of sanguine colour when the blazoning is done by precious stones.