|Easton's Bible Dictionary|
(Revelation 21:20), a species of the carnelian combining the sard and the onyx, having three layers of opaque spots or stripes on a transparent red basis. Like the sardine, it is a variety of the chalcedony.
Noah Webster's Dictionary
(n.) A variety of onyx consisting of sard and white chalcedony in alternate layers.
Int. Standard Bible Encyclopedia
See STONES, PRECIOUS.
Sardonyx (1 Occurrence)
Revelation 21:20 the fifth, sardonyx; the sixth, sardius; the seventh, chrysolite; the eighth, beryl; the ninth, topaz; the tenth, chrysoprasus; the eleventh, jacinth; and the twelfth, amethyst. (WEB KJV ASV BBE DBY WBS YLT NAS NIV)