GalvornGalvorn - Galvorn is a black metal created by Eöl the Dark Elf with the help of the Dwarves.

 

"...and there Eöl would meet the Naugrim and hold converse with them.  And as their friendship grew he would at times go and dwell in the deep mansions of Nogrod or Belegost.  There he learned much of metalwork, and came to great skill therein; and he devised a metal as hard as the steel of the Dwarves, but so malleable that he could make it thin and supple; and yet it remained resistant to all blades and darts.  He named it galvorn, for it was black and shining like jet, and he was clad in it whenever he went abroad." ~The Silmarillion, chap. 16 (Of Maeglin)