'Iron' in the Bible

(For Og, king of Bashan, was the last of all the Rephaim; his bed was made of iron; is it not in Rabbah, in the land of the children of Ammon? It was nine cubits long and four cubits wide, measured by the common cubit.)

Where there will be bread for you in full measure and you will be in need of nothing; a land where the very stones are iron and from whose hills you may get copper.

There you are to make an altar to the Lord your God, of stones on which no iron instrument has been used.

And the heaven over your heads will be brass, and the earth under you hard as iron.

For this cause you will become servants to those whom the Lord your God will send against you, without food and drink and clothing, and in need of all things: and he will put a yoke of iron on your neck till he has put an end to you.

Your shoes will be iron and brass; and as your days, so may your work be.