Difference between revisions of "True Blue"
From The Gemology Project
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+ | Discovered in the Yukon, Canada. An exceptionally dark blue aquamarine, whose color is the result of an extremely high concentration of iron. Unlike the Maxixe beryl, the color is photostable.<br> | ||
==External links== | ==External links== | ||
[http://www.truenorthgems.com/s/Photos_TrueBlue.asp True North Gems]<br> | [http://www.truenorthgems.com/s/Photos_TrueBlue.asp True North Gems]<br> | ||
[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] | [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 09:11, 4 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 |
Discovered in the Yukon, Canada. An exceptionally dark blue aquamarine, whose color is the result of an extremely high concentration of iron. Unlike the Maxixe beryl, the color is photostable.
External links
True North Gems
Mineralogical and geochemical study of True Blue Aquamarine Showing