+Cleavage describes the tendency of a [mineral](/wiki/mineral) or rock to split along distinct planes, often parallel to crystallographic directions. This inherent weakness dictates how materials fracture under [stress](/wiki/stress).
+## See also
+- [Fracture](/wiki/fracture)
+- [Crystal structure](/wiki/crystal_structure)
+- [Geology](/wiki/geology)
... 1 more lines