Iron Ore is a semicommon ore and appears underground.It is craftable into some objects.(See the recipes in the last section)
To mine a iron ore, you need a pickaxe a few times,differing on the pickaxe you're using. You need 3 Iron Ores to make 25 Iron Bricks,and 1 Iron Ore to make 25 smooth iron blocks.
Craftable into smooth blocks?:Yes
Recipes:Iron Brick,Iron Urn,Maple Window,Stool,Smooth Iron Brick