From Tolkien Gateway

Copper was a metal familiar to the smiths of Middle-earth. Mahtan, the father of Nerdanel (the wife of Fëanor), prized this metal above gold. He wore a band of copper about his head and was known as Urundil or "copper-lover".[1] There were objects of copper and bronze in the hoards of the Barrow-downs.[2]

Etymology[edit | edit source]

From the root RUN meaning "red, glowing" came the Quenya word Urun for copper.[1]

Other versions of the legendarium[edit | edit source]

Copper was one of the six metals used by Aulë to create the alloy Tilkal. It was used to forge the great chain Angainor to bind Melkor. In a footnote, it was explained that "tilkal" was an acronym formed from the initial letters for each of the six metals. The first letter, 't' came from tambë, which was apparently the word for "copper".[3]