Dict: easton - Emerald

easton:

Emerald @ Heb. nophek kjv@Exodus:28:18 kjv@Exodus:39:11); i.e., the "glowing stone", probably the carbuncle, a precious stone in the breastplate of the high priest. It is mentioned kjv@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."