Cross reference
Exodus 25:3
3 And this is the offering which ye shall take of them; gold, and silver, and brass,
Deuteronomy 8:9
9 A land wherein thou shalt eat bread without scarceness, thou shalt not lack any thing in it; a land whose stones are iron, and out of whose hills thou mayest dig brass.
Job 28:2
2 Iron is taken out of the earth, and brass is molten out of the stone.