Difference between revisions of "True Blue"

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==External links==
 
==External links==
 
[http://www.truenorthgems.com/s/Photos_TrueBlue.asp True North Gems]
 
[http://www.truenorthgems.com/s/Photos_TrueBlue.asp True North Gems]
 +
[http://www.geology.gov.yk.ca/publications/yeg/yeg04/21_turner.pdf#search=%22true%20blue%20aquamarine%5D%22 Mineralogical and geochemical study of True Blue Aquamarine Showing]

Revision as of 07:49, 3 October 2006

True Blue beryl
Chemical composition Beryllium Aluminium Silicate Be3Al2(SiO3)6
Crystal system Hexagonal
Habit edit me
Cleavage edit me
Fracture edit me
Hardness 7.5
Optic nature edit me
Refractive index 1.57 - 1.58
Birefringence edit me
Dispersion edit me
Specific gravity 2.69
Lustre Vitreous
Pleochroism edit me

External links

True North Gems Mineralogical and geochemical study of True Blue Aquamarine Showing