sardian (3037 being implied), i.e. (as noun) the gem so called Derivation: properly, an adjective from an uncertain base;
KJV Usage: sardius.
TBESG:
σάρδιον
gem
G:N-N
σάρδιον, -ον, τ [in LXX for אֹדֶם, Exo.28:17, al.; also for שֹׁהַם ;] the sardian stone, sard (of which carnelian is one variety): Refs Rev.4:3 21:20.† (AS)
Thayer:
1) a sardius, a precious stone of which there are two types, the former is called a carnelian (because flesh coloured) and the latter a sard
σάρδιος
sardios
sar'-dee-os
Proper adjective from an uncertain base; sardian (G3037 being implied), that is, (as noun) the gem so called
G4555 σάρδινοςσάρδινος
sardinos
sar'-dee-nos
From the same as G4556; sardine (G3037 being implied), that is, a gem, so called
KJV Usage: sardine.
G4557 σαρδόνυξσαρδόνυξ
sardonux
sar-don'-oox
From the base of G4556 and ὄνυξ onux (the nail of a finger; hence the “onyx” stone); a “sardonyx”, that is, the gem so called
λίθος
lithos
lee'-thos
Apparently a primary word; a stone (literally or figuratively)
KJV Usage: (mill-, stumbling-) stone.
G3034 λιθάζωλιθάζω
lithazō
lith-ad'-zo
From G3037; to lapidate
KJV Usage: stone.
G3035 λίθινοςλίθινος
lithinos
lith'-ee-nos
From G3037; stony, that is, made of stone
KJV Usage: of stone.
G3036 λιθοβολέωλιθοβολέω
lithoboleō
lith-ob-ol-eh'-o
From a compound of G3037 and G906; to throwstones, that is, lapidate
KJV Usage: stone, cast stones.
G3038 λιθόστρωτοςλιθόστρωτος
lithostrōtos
lith-os'-tro-tos
From G3037 and a derivative of G4766; stonestrewed, that is, a tessellated mosaic on which the Roman tribunal was placed
KJV Usage: Pavement.
G4074 ΠέτροςΠέτρος
Petros
pet'-ros
Apparently a primary word; a (piece of) rock (larger than G3037); as a name, Petrus, an apostle