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Geosciences LibreTexts

16.8.6: Uvarovite

  • Page ID
    4137
  • Uvarovite Garnet
    Chemical composition Ca3Cr2(SiO4)3

    Calcium chromium silicate

    Crystal system Cubic
    Habit Dodecahedra
    Cleavage None
    Hardness 7.5
    Optic nature Isotropic
    Refractive index 1.86-1.87
    Birefringence None
    Specific gravity 3.77
    Lustre Vitreous

    Figure \(\PageIndex{1}\): Uvarovite
    Photo courtesy of Rick Martin

    Uvarovite is hardly ever found in crystals large enough to be cut into gemstones.