STEP Greek Lexicon: σμάραγδος

σμάραγδος, -ου, ἡ

(and in late writers also ὁ), [in LXX: Exo.28:9 (שֹׁהַם) Exo.36:17 (Exo.39:10) (בָּרֶקֶת), Eze.28:13 (יַהֲלֹם), etc. ;]

emerald or other trans parent green stone (LS, see word; DB, iv, 620; Swete, Ap., 67, 288): Rev.21:19.†

(AS)