Quick Definition
carnelian
Strong's Definition
sardian (3037 being implied), i.e. (as noun) the gem so called
Derivation: properly, an adjective from an uncertain base;
KJV Usage: sardius
Thayer's Greek Lexicon
σάρδιον, σαρδίου, τό (neuter of σάρδιος, see below), sard, sardius, a precious stone, of which there are two kinds, concerning which Theophrastus, de lapid. 16, 5, § 30, Schneid. edition says, τοῦ γάρ σαρδίου τό μέν διαφανες ἐρυθροτερον δέ καλεῖται θῆλυ, τό δέ διαφανες μέν μελαντερον δέ καίi ἄρσεν, the former of which is called carnelian (because flesh-colored; Hebrew ΰΙγΖν, the Sept. σάρδιον, Exo_28:17; Exo_36:17 (Exo_39:10); Eze_28:13; ἁιματοεντα σαρδια, the Orphica, de lapid. 16, 5), the latter sard: Rev_4:3 (Rec. σαρδίνῳ); Rev_21:20 G L T Tr WH. Hence, the adjective σάρδιος, σαρδια, σάρδιον (from Σάρδεις, cf. Pliny, h. n. 37, 7) sardine namely, λίθος (the full phrase occurs Exo_35:8 (variant)): Rev_21:20 Rec. (B. D., see under the words, Sardine, Sardius.)
Mounce Concise Greek Dictionary
σάρδιον sardion 2x
carnelian, a reddish precious stone, Rev_4:3 ; Rev_21:20
Abbott-Smith Greek Lexicon
σάρδιον , -ον , τ ,
[in LXX for H124 , Exo_28:17 , al. ; also for H7718 ;]
the sardian stone, sard (of which carnelian is one variety): Rev_4:3 ; Rev_21:20 .†
Moulton & Milligan — Vocabulary of the Greek NT
σάρδιον (~ σάρδιος ) [page 569]
sard ( Rev_4:3 ; Rev_21:20 ), a red stone, perhaps the cornelian : cf. Syll 588 .3 ( c . B.C. 180) δακτὐλιον χρυσοῦν σάρδιον .
STEPBible — Tyndale Abridged Greek Lexicon
σάρδιον, -ον, τ
[in LXX for אֹדֶם, Exo.28:17, al.; also for שֹׁהַם ;]
the sardian stone, sard (of which carnelian is one variety): Rev.4:3 21:20.†
(AS)