Physical Properties of Emeralds

Physical Properties of Emeralds

MINERAL: Beryl, CHEMISTRY: Be3Al2Si6O18, COLOR: Vibrant green

REFRACTIVE INDEX: 1.577 to 1.583,  BIREFRINGENCE: 0.005 to 0.009

SPECIFIC GRAVITY:   2.72, MOHS HARDNESS: 7.5 to 8

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