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Article: Cleavage (crystal)

Cleavage (crystal)

Types of Cleavage

  • Miller indices {h k ℓ}
  • Basal, pinacoidal, or planar cleavage
  • Prismatic cleavage
  • Non-Prismatic cleavage
  • Cubic cleavage
  • Rhombohedral cleavage
  • Octahedral cleavage
  • Dodecahedral cleavage


  • Crystal parting occurs due to external stress
  • Parting breaks are similar in appearance to cleavage
  • Cleavage occurs due to design weakness, while parting results from growth defects
  • Examples of parting include octahedral parting of magnetite and basal parting in corundum


  • Cleavage is used in mineral identification
  • Cleavage angles can be diagnostic for certain minerals
  • Crystal cleavage is important in the electronics industry and gemstone cutting
  • Precious stones are cleaved by impact
  • Synthetic single crystals of semiconductor materials are cleaved to form thin wafers

Additional Information

  • Cleavage in geology

Cleavage (crystal) Data Sources

Reference URL
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