Strong’s Greek
G5470 — chalkeos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
χαλκοῦς
chalkeos — pronounced khal'-keh-os
from 5475; coppery:--brass. see GREEK for 5475
1 occurrence in the KJV.
Revelation 9:20
And the rest of the men which were not killed by these plagues yet repented not of the works of their hands, that they should not worship devils, and idols of gold, and silver, and brass, and stone, and of wood: which neither can see, nor hear, nor walk: