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 Gemstones


Amazonite
Neptunite
Neptunite and Amazonite Optical Properties


Optical Properties
Luster
Vitreous  
Vitreous  
Pleochroism
-  
x=yellow-orange  
Dispersion
0.01  
99+
0.03  
99+
Transparency
Translucent, Translucent to opaque  
Translucent  
Refractive Index
1.522-1.530  
1.692-1.734  
Optic Character
-  
-  
Crystal System
Triclinic  
monoclinic  
Birefringence
0.008-0.010  
0.0294-0.0452  
Clarity
Translucent  
Translucent  
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