'Iron' in the Bible

When they had passed the first and second guard, they came to the iron gate that leads into the city, which opened for them by itself; and they went out and went along one street, and immediately the angel departed from him.

by means of the hypocrisy of liars seared in their own conscience as with a branding iron,

and he shall rule them with a rod of iron, as the vessels of the potter are broken to pieces, as I also have received authority from My Father;

They had breastplates like breastplates of iron; and the sound of their wings was like the sound of chariots, of many horses rushing to battle.

And she gave birth to a son, a male child, who is to rule 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, and every kind of citron wood and every article of ivory and every article made from very costly wood and bronze and iron and marble,

From His mouth comes a sharp sword, so that with it He may strike down the nations, and He will rule them with a rod of iron; and He treads the wine press of the fierce wrath of God, the Almighty.