Orthorhombic System

Characteristics of Orthorhombic Crystals:

  • Three crystallographic axes of unequal length that make angles of 90 degrees with each other
  • Three 2-fold symmetry axes

Common Minerals of the Orthorhombic System

  • Sillimanite
  • Andalusite
  • Anthophyllite
  • Aragonite
  • Barite
  • Brookite
  • Chrysoberyl
  • Columbite
  • Cordierite
  • Danburite
  • Enstatite
  • Goethite
  • Marcasite
  • Olivine
  • Stibnite
  • Sulfur
  • Topaz