'Iron' in the Bible

And when they were past the first and the second guard, they came unto the iron gate that leadeth into the city; which opened to them of its own accord: and they went out, and passed on through one street; and straightway the angel departed from him.

through the hypocrisy of men that speak lies, branded in their own conscience as with a hot iron;

and he shall rule them with a rod of iron, as the vessels of the potter are broken to shivers; as I also have received of my Father:

And they had breastplates, as it were breastplates of iron; and the sound of their wings was as the sound of chariots, of many horses rushing to war.

And she was delivered of a son, a man child, who is to rule all the nations with a rod of iron: and her child was caught up unto God, and unto his throne.

merchandise of gold, and silver, and precious stone, and pearls, and fine linen, and purple, and silk, and scarlet; and all thyine wood, and every vessel of ivory, and every vessel made of most precious wood, and of brass, and iron, and marble;

And out of his mouth proceedeth a sharp sword, that with it he should smite the nations: and he shall rule them with a rod of iron: and he treadeth the winepress of the fierceness of the wrath of God, the Almighty.