Fracture is conchoidal, meaning that diamonds are brittle and when they break, the break does not follow any natural plane of separation.
A diamond fracture is a break or a crack in the stone.
Yes, diamond fractures along its crystal orientation plane (e.g. 111 ,110, etc). This is method in which diamond is cleaved for jewelry.
A diamond has cleavage not fracture Schumachere adds:The cleavage is perfect, octahedral. There is no fracture for diamond.
Cleavage