Luster is greasy, waxy or silky. Transparency crystals are translucent and masses are opaque. Crystal System is variable, see above. Veins of viberous serpentine can be found inside of massive serpentine or other rocks. Cleavage the varieties of crysotile have none, in lizardite and antigorite it is good in one direction.
Fracture is conchoidal in antigorite and lizardite and splintery in the crysotiles.
Best Field Indicators softness, color, silky feel and luster, asbestos if present and its flexibility.