Template:Ametrine

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Ametrine
Chemical composition Silicon dioxide SiO2
Crystal system Trigonal
Habit prismatic
Cleavage poor
Fracture conchoidal
Hardness 7
Optic nature uniaxial +
Refractive index 1.544 - 1.553
Birefringence 0.009
Dispersion 0.013
Specific gravity 2.63 - 2.65
Lustre Vitreous