Ore describes unforged or unworked metal in its rawest form, taken from mines and diggings. Ore is unpure metal that must be smelted to remove any unwanted elements, such as other metals or minerals. The name of the ore will indicate as to what kind of refined metal it yields, for example, mithral ore can be smelted to become pure mithral. Ore by itself is considered unworkable. All precious metals, such as gold and silver, come from ore originally. Even though ore needs smelting to become the metal desired, it is still considered a tradeable resource. If raw ore is not traded, a civilisation might still sell the metal in worked ingots.