Tetragonal System

Characteristics of Tetragonal Crystals:

  • Three crystallographic axes that make right angles with each other
  • Two horizontal axes of equal length, vertical axis is of a different length
  • Unique 4-fold symmetry

Common Minerals of the Tetragonal System

  • Zircon
  • Rutile
  • Anatase
  • Cassiterite
  • Apophyllite
  • Idocrase
  • Phosgenite
  • Chalcopyrite
  • Stannite
  • Fergusonite
  • Scheelite
  • Powellite
  • Scapolite
  • Wulfenite