The physical properties of Talc consist of the following; it has perfect Cleavage, no fracture. Its Streak is white to pale green. Its luster is pearly; its hardness is a one on the hardness scale. Its color can vary from green, white, gray brown, or colorless. Its crystal system is monoclinic, and its specific gravity is 2.7 to 2.8. The
crystal structure of Talc is triclinic.