'Iron' in the Bible

The temple’s construction used finished stones cut at the quarry so that no hammer, chisel, or any iron tool was heard in the temple while it was being built.

For they are Your people and Your inheritance;You brought them out of Egypt,out of the middle of an iron furnace.

Then Zedekiah son of Chenaanah made iron horns and said, “This is what the Lord says: ‘You will gore the Arameans with these until they are finished off.’”