[σαρδόνυξ] from the base of G4556 and ὄνυξ (the nail of a finger; hence the "onyx" stone); a "sardonyx", i.e. the gem so called
Usages throughout the bible
Revelation 21:20
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The fifth, sardonyx; G4557 the sixth, sardius; the seventh, chrysolite; the eighth, beryl; the ninth, a topaz; the tenth, a chrysoprasus; the eleventh, a jacinth; the twelfth, an amethyst.
