Galvorn was a metal devised by Eöl (the Dark Elf) of Nan Elmoth.

It was as hard as the steel of the Dwarves, but so malleable that he could make it thin and supple; and it still remained resistant to all blades and darts.

He named it Galvorn, for it was black and shone like jet, and he wore it whenever he left his home.