Template:Chrysoberyl
From The Gemology Project
Revision as of 11:38, 1 November 2006 by Africanuck (talk | contribs)
Chrysoberyl | |
---|---|
Chemical composition | BeAl2O4 |
Crystal system | orthorombic |
Habit | pseudo-hexagonal twins |
Cleavage | weak to moderate |
Fracture | conchoidal to uneven |
Hardness | 8.5 |
Optic nature | biaxial + |
Refractive index | 1.74-1.75 |
Birefringence | 0.009 |
Dispersion | low, 0.014 |
Specific gravity | 3.72 |
Lustre | bright vitreous |
Pleochroism | moderate to strong |