'Iron' in the Bible

and he shall shepherd them with an iron rod; as vessels of pottery are they broken in pieces, as I also have received from my Father;

and they had breastplates as breastplates of iron, and the sound of their wings was as the sound of chariots of many horses running to war;

And she brought forth a male son, who shall shepherd all the nations with an iron rod; and her child was caught up to God and to his throne.

lading of gold, and silver, and precious stones, and pearl, and fine linen, and purple, and silk, and scarlet dye, and all thyine wood, and every article in ivory, and every article in most precious wood, and in brass, and in iron, and in marble,

And out of his mouth goes a sharp two-edged sword, that with it he might smite the nations; and he shall shepherd them with an iron rod; and he treads the wine-press of the fury of the wrath of God the Almighty.