Template:Sphene

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Sphene
Chemical composition CaTiOSiO4
Crystal system Monoclinic
Habit Wedge shaped, massive
Cleavage Distinct, prismatic
Fracture Conchoidal
Hardness 5.0-5.5
Optic nature Biaxial +
Refractive index 1.880-2.099
Birefringence 0.100-0.135
Dispersion High, 0.051
Specific gravity 3.45-3.55
Lustre Resinous to sub-adamantine
Pleochroism Distinct to strong