The fictional metal mined in Moria in J.R.R. Tolkien’s works is mithril.
Mithril is described as a rare, light, strong, and highly valuable metal found beneath the Misty Mountains. Moria, also called Khazad-dûm, became famous for its deposits. In The Lord of the Rings, Gandalf explains that the Dwarves dug too deeply while seeking mithril and awakened the Balrog beneath the mines.
The metal is especially associated with Bilbo’s coat of mail, which he gives to Frodo. Tolkien also links mithril with the Elvish name “silver-glint,” reflecting its appearance and exceptional properties. Ithildin is a different material: a moonlit substance used in inscriptions and decoration. Galvorn is another fictional metal in Tolkien’s wider mythology, but it is not the famous Moria metal.