Bible Dictionaries
Sardonyx

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.

Bibliography Information
Easton, Matthew George. Entry for 'Sardonyx'. Easton's Bible Dictionary. https://www.studylight.org/​dictionaries/​eng/​ebd/​s/sardonyx.html. 1897.