Luster is vitreous. Transparency crystals are transparent to translucent. Combinations of these forms are common and sometimes the rare faces of the hexoctahedron, a 48 sided crystal habit that rarely is seen by itself, can also combine with these other forms making very attractive, complex and multifaceted crystals. Massive and granular occurrences are also seen. Commonly forms crusts that show many rhombic faces Cleavage is absent.
Fracture is conchoidal.
Streak is white. Associated Minerals are micas , chlorite , diopside , calcite , idocrase and serpentine . Best Field Indicators are crystal habit, color, enviroment and hardness.