Question: is serpentine cleavage or fracture?
Answer: 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. Hardness is 3 - 4.5. Specific Gravity is 2.2 - 2.6.