Dictionary entry

ἀμέθυστος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

ἀμέθυστος, -ου, ἡ

(acc. to Plut., < ἀ-μεθύω, being regarded as an antidote against drunkenness), [in LXX: Ex 28:19 36:19 39:12 Ez 28:13*;]

amethyst, a purple quartz: Re 21:20.†