the mineral will not display cleavage. Corundum, for example, displays no cleavage.

Types of cleavage

Cleavage forms parallel to crystallographic planes:

*Basal, pinacoidal, or planar cleavage occurs when there is only one cleavage plane. Talc has basal cleavage. Mica (like muscovite or biotite) also has basal cleavage; this is why mica can be peeled into

1.Previous
3.Next