From Minecraft Wiki
Iron may refer to:
Iron Ore - an ore found underground, and the item obtained by mining it.
Iron Ingot - an item created by smelting Iron ore, used for crafting.
Block of Iron - a block created by crafting 9 Iron ingots, used for compact Iron storage, for decoration, and to create Iron Golems.
Iron Bars - a block made of Iron that function exactly like glass panes.
Iron Golem - a neutral mob which targets neutral or hostile mobs to protect villagers.
Iron may also refer to the following tools, weapons, or items: