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16.4.6: Green Beryl

Last updated

May 6, 2022
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- 16.4.5: Goshenite
- 16.4.7: Heliodor

gemology
Gemology Project

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Green Beryl
Chemical composition	Be₃Al₂(SiO₃)₆Beryllium aluminium silicate
Crystal system	Hexagonal
Habit	Prismatic
Cleavage	Imperfect, basal
Hardness	7.5
Optic nature	Uniaxial -
Refractive index	1.564 - 1.593
Birefringence	0.005-0.006
Dispersion	Low, 0.014
Specific gravity	2.68-2.72
Lustre	Vitreous
Pleochroism	Weak to distinct

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