Emerald
Easton, 1897
Heb. nophek (Exodus 28:18; Exodus 39:11); i.e., the "glowing stone", probably the carbuncle, a precious stone in the breastplate of the high priest. It is mentioned (Revelation 21:19) as one of the foundations of the New Jerusalem. The name given to this stone in the New Testament Greek is smaragdos, which means "live coal."
Dictionary: M. G. Easton, Illustrated Bible Dictionary (1897, public domain).