Luster is vitreous. Transparency crystals are transparent to translucent. But more commonly is found as the 24 sided trapezohedron. Combinations of these forms are common. Massive and granular occurrences are also seen.
Cleavage is absent.
Fracture is conchoidal. Streak is white. Associated Minerals are chromite and serpentine . Best Field Indicators are crystal habit, color, locality and hardness.