'Copper' in the Bible

And all the silver, and gold, and vessels of copper and iron, shall be holy to Jehovah; they shall come into the treasury of Jehovah.

And they burned the city with fire, and all that was therein; only the silver, and the gold, and the vessels of copper and of iron, they put into the treasury of the house of Jehovah.

and spoke to them, saying, Return unto your tents with much wealth and with very much cattle, with silver, and with gold, and with copper, and with iron, and with clothing, in very great quantity; divide the spoil of your enemies with your brethren.