Exodus 25:3

Overview - Exodus 25
What the Israelites were to offer for the formation of the tabernacle.
10 The form of the ark.
17 The mercy seat, with the cherubims.
23 The table of shew bread, with the furniture thereof.
31 The golden candlestick, with the instruments thereof.
Treasury of Scripture Knowledge

Exodus 25:3  (King James Version)
And this is the offering which ye shall take of them; gold, and silver, and brass,

{Nechosheth,} rather, copper; as brass is a factitious metal, composed of copper, and the oxide or ore of zinc, called {lapis calaminaris.}
Deuteronomy 8:9 ; Job 28:2