DerilliumCanonLegendsInfinitiesDerillium was an ore. It was used to make space mines. AppearancesStar Wars: The Old Republic: Legacy of the Sith (Codex entry) (Unknown)Unknown UnknownNoneStar Wars Galaxies: An Empire Divided (Unknown)Unknown UnknownNoneStar Wars: Rebel Assault II: The Hidden Empire (First appearance) (Unknown)Unknown UnknownNone