Difference between revisions of "Ametrine"

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{{Ametrine}}
 
{{Ametrine}}
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==External links==
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*[http://minerals.caltech.edu/AMETRINE/Index.html Ametrine from Caltech]

Revision as of 23:51, 27 September 2006

Ametrine
Chemical composition Silicon dioxide SiO2
Crystal system Trigonal
Habit Prismatic
Cleavage Poor
Fracture Conchoidal
Hardness 7
Optic nature Uniaxial +
Refractive index 1.544 - 1.553
Birefringence 0.009
Dispersion 0.013
Specific gravity 2.63 - 2.65
Lustre Vitreous

External links