cleavage
Gypsum has cleavage, which means it tends to break along flat surfaces.
Quartz does not have cleavage. However, it does have fracture. Its fracture is conchoidal.
it has no cleavage
it has no cleavage
Fracture
yes
Hematite has a characteristic fracture, meaning it breaks irregularly with rough or jagged edges and no smooth cleavage planes.
the cleavage is Poor
Gypsum has a brittle fracture with a conchoidal or uneven break. It tends to break into irregular, sharp pieces when fractured.
Sapphire has a mixture of both cleavage and fracture characteristics. It has poor cleavage in one direction and conchoidal fracture, which means it breaks with smooth, curved surfaces similar to glass.
It has both cleavage and fracture.
Cleavage