Template:Morganite
From The Gemology Project
Revision as of 11:48, 1 November 2006 by Africanuck (talk | contribs)
Morganite | |
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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) |