From The Gemology Project
Revision as of 06:35, 2 October 2006 by Africanuck (talk | contribs)
Jump to: navigation, search
Chemical composition Aluminium Beryllium Silicate Al2Be3(Si6O18)
Crystal system Hexagonal
Habit edit me
Cleavage edit me
Fracture edit me
Hardness 7.5
Optic nature edit me
Refraction index 1.58 - 1.59
Birefringence edit me
Dispersion edit me
Specific gravity 2.80
Lustre Vitreous
Pleochroism edit me