Is it possible for a mineral to have a prismatic habit without having a cleavage?

Yes, a mineral can have a prismatic habit without exhibiting cleavage. Prismatic habit refers to the crystal form of a mineral that resembles elongated, prism-like shapes. Cleavage, on the other hand, is the tendency of a mineral to break along specific planes of weakness in its structure. A mineral may grow in a prismatic shape while lacking defined cleavage planes, resulting in a more conchoidal or uneven fracture instead.