Strong's #4557: sardonux (pronounced sar-don'-oox)

from the base of 4556 and onux (the nail of a finger; hence the "onyx" stone); a "sardonyx", i.e. the gem so called:-- sardonyx.

Thayer's Greek Lexicon:

́

sardonux

1) a sardonyx, a precious stone marked by the red colours of the carnelian (sard) and the white of the onyx

Part of Speech: noun masculine

Relation: from the base of G4556 and onux (the nail of a finger, hence the "onyx" stone)

Usage:

This word is used 1 times:

 

Revelation 21:20: "The fifth, sardonyx; the sixth, sardius; the seventh,"