Sardine stone
Easton, 1897
(Revelation 4:3, R.V., "sardius;" Heb. odhem; LXX., Gr. sardion, from a root meaning "red"), a gem of a blood-red colour. It was called "sardius" because obtained from Sardis in Lydia. It is enumerated among the precious stones in the high priest's breastplate (Exodus 28:17; Exodus 39:10). It is our red carnelian.
Dictionary: M. G. Easton, Illustrated Bible Dictionary (1897, public domain).