ilmenite

noun

1. a very common black mineral, iron titanate, FeTiO3, occurring in crystals but more commonly massive.

noun

1. a black mineral found in igneous rocks as layered deposits and in veins. It is the chief source of titanium. Composition: iron titanium oxide. Formula: FeTiO 3 . Crystal structure: hexagonal (rhombohedral)

1. A lustrous black to brownish rhombohedral mineral that is an ore of titanium. Ilmenite occurs in igneous rocks and is one of the principal dark minerals observed in beach sands. Chemical formula: FeTiO3.