Mithril is a metal found in Middle-earth as described in the fantasy writings of J.R.R. Tolkien. It resembles silver but is stronger than steel, and much lighter in weight than either. The author first wrote of it in The Lord of the Rings, and it is retrospectively mentioned in the third, revised edition of The Hobbit in 1966. In the first 1937 edition, the mail shirt given to Bilbo is described as being made of "silvered steel".
In The Lord of the Rings, Tolkien wrote that mithril is found only in the mountains of Moria, where it was mined by the Dwarves. Unfinished Tales alleges that it is also found in Númenor.
The name mithril comes from two words in Sindarin—mith, meaning "grey" or "mist", and ril meaning "glitter"."