What is the clevage of the diamond?

Diamonds have a perfect cleavage, meaning they can be split along specific crystallographic planes with relative ease. This characteristic is due to the arrangement of carbon atoms in their crystal structure, which allows for smooth, flat surfaces when cleaved. Cleavage in diamonds is typically observed in specific directions, making it important for gem cutters to understand when shaping the stone. However, because of their hardness, diamonds are more often cut rather than cleaved in practice.