Mithril. Desired by all folk of Middle Earth. It could be beaten like copper, and polished like glass; and the Dwarves could make of it a metal, light and yet harder than tempered steel. Its beauty was like to that of common silver, but the beauty of mithril did not tarnish or grow dim. The Noldor of Eregion made an alloy from it called “ithildin” which was visible only by starlight or moonlight.