'Iron' in the Bible

and he shall shepherd and rule them with a rod of iron, as the earthen pots are broken in pieces, as I also have received authority [and power to rule them] from My Father;

They had breastplates (scales) like breastplates made of iron; and the [whirring] noise of their wings was like the [thunderous] noise of countless horse-drawn chariots charging [at full speed] into battle.

And she gave birth to a Son, a male Child, who is destined to rule (shepherd) all the nations with a rod of iron; and her Child was caught up to God and to His throne.

cargoes of gold and silver and precious stones and pearls and fine linen and purple and silk and scarlet; all kinds of citron (scented) wood and every article of ivory and every article of very costly and lavish wood and bronze and iron and marble;

From His mouth comes a sharp sword (His word) with which He may strike down the nations, and He will rule them with a rod of iron; and He will tread the wine press of the fierce wrath of God, the Almighty [in judgment of the rebellious world].