Template:Morganite

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Morganite
Chemical composition Beryllium Aluminium Silicate Be3Al2(SiO3)6
Crystal system Hexagonal
Habit prismatic
Cleavage poor, basal
Fracture conchoidal to uneven
Hardness 7.5
Optic nature unixaial -
Refractive index 1.58 - 1.60
Birefringence 0.008 - 0.009
Dispersion low, 0.014
Specific gravity 2.80 - 2.90
Lustre Vitreous
Pleochroism weak to moderate (shades of body color)