burnished copper

, probably "a mixed metal of great brilliance" (Swete): (RV,).† chalcolibanus burnished brass Re 1:15 2:18

koper

orichalcum, a fine metal, or frankincense of a yellow color.

bronze

burnished copper, an alloy of copper (or gold) and silver having a brilliant lustre

fine brass

χαλκο-λίβανον, -ου, τό chalcolibanus, probably "a mixed metal of great brilliance" (Swete): Rev.1:15 2:18 (RV, burnished brass).† (AS)