Bible Dictionary

Carbuncle.

CAR'BUNCLE. This term represents two Hebrew words. The first, Ex 28:17; Ex 39:10; Eze 28:13, meaning flashing like lightning, is supposed to be either the emerald or beryl, both of which are precious…

Hastings' Dictionary of the Bible (1898)

CAR'BUNCLE. This term represents two Hebrew words. " Thy gates of carbuncles," Isa 54:12, has reference to a stone shining like fire — possibly a brilliant species of ruby.