Read and study the Scriptures — select any book and chapter, search for a phrase, or tap the ⇆ markers to explore cross-references.
EmeraldEASTON'S
Heb. nophek (Ex. 28:18; 39:11); i.e., the “glowing stone”, probably the carbuncle, a precious stone in the breastplate of the high priest. It is mentioned (Rev. 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.”
Easton's Illustrated Bible Dictionary, 3rd ed. (1897), public domain.