Template:Peridot

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Peridot
Chemical composition (Mg,Fe)2SiO4
Crystal system Orthorhombic
Habit Prismatic
Cleavage Poor
Fracture Conchoidal
Hardness 6.5
Optic nature Biaxial +
Refractive index 1.65 - 1.69
Birefringence 0.036
Dispersion Medium, 0.020
Specific gravity 3.34
Lustre Vitreous
Pleochroism Weak