Ores are various types of minerals found in the game. All ores can be found my mining underground. Common ores (such as copper and iron) can be found rarely on the surface, and rarer ores (such as gold and silver) can be found on Floating Islands. Demonite Ore be found in trace amounts underground and more commonly in the Underground Corruption, and can be obtained from the Eye of Cthulhu or the Eater of Worlds. All ores can be smelted into bars at a furnace (Hellstone can only be smelted at a Hellforge or better, and Adamantite and Titanium can only be smelted at an Adamantite or Titanium Forge). Iron and gold ores are also used to create Ironskin Potions and Spelunker Potions, respectively.