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Geosciences LibreTexts

16.9.2: Tashmarine™

  • Page ID
    4140
  • Tashmarine Diopside
    Chemical composition CaMg(SiO3)2

    Calcium magnesium silicate

    Crystal system Monoclinic
    Habit Prismatic, waterworn pebbles
    Cleavage Distinct
    Fracture Conchoidal
    Hardness 5
    Optic nature Biaxial +
    Refractive index 1.667-1.693
    Birefringence 0.025
    Dispersion Low, 0.013
    Specific gravity 3.29
    Lustre Vitreous
    Pleochroism Weak to none

    Tashmarine™ is a trade name for yellowish green diopside found in, amongst other places, Tashkent, Uzbekistan.