primarily, "copper," became used for metals in general, later was applied to bronze, a mixture of copper and tin, then, by metonymy, to any article made of these metals, e.g., money, Mat 10:9, Mar 6:8, Mar 12:41, or a sounding instrument, 1Co 13:1, figurative of a person destitute of love. See Rev 18:12. See MONEY.
<2,,5470, chalkeos>
"made of brass or bronze," is used of idols, Rev 9:20.
<3,,5473, chalkion>
is used in Mar 7:4 of "brazen vessels."
<4,,5474, chalkolibanon>
is used of "white or shining copper or bronze," and describes the feet of the Lord, in Rev 1:15, Rev 2:18.
<5,,5471, chalkeus>
denotes "a coppersmith," 2Ti 4:14.