'Iron' in the Bible

The house, while it was being built, was built of stone prepared at the quarry, and there was neither hammer nor axe nor any iron tool heard in the house while it was being built.

(for they are Your people and Your inheritance which You have brought forth from Egypt, from the midst of the iron furnace),

Then Zedekiah the son of Chenaanah made horns of iron for himself and said, “Thus says the Lord, ‘With these you will gore the Arameans until they are consumed.’”