[ἀμέθυστος] from G1 (as a negative particle) and a derivative of G3184; the "amethyst" (supposed to prevent intoxication)
Usages throughout the bible
Revelation 21:20
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The fifth, sardonyx; 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. G271