Template:Maxixe
From The Gemology Project
Maxixe beryl | |
---|---|
Chemical composition | Be3Al2(SiO3)6 Beryllium aluminum silicate |
Crystal system | Hexagonal |
Habit | Prismatic |
Cleavage | Poor, basal |
Fracture | Conchoidal to uneven |
Hardness | 7.5 |
Optic nature | Uniaxial - |
Refractive index | 1.579 - 1.592 |
Birefringence | 0.007 |
Dispersion | Low, 0.0014 |
Specific gravity | 2.69 - 2.8 |
Lustre | Vitreous |
Pleochroism | Distinct |