Category:Sardonyx

Sar"do*nyx, n. Etym: [l., fr. Gr. Sard, and onyx.] (min.)

Defn: a variety of onyx consisting of sard and white chalcedony in Alternate layers.

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---excerpt from the Illustrated Bible Dictionary

Sardonyx - (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.