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Turquoise
Powellite
Powellite and Turquoise Optical Properties


Optical Properties
Luster
Waxy  
Greasy, Subadamantine  
Pleochroism
Weak  
In deeply colored specimens: blue greenAnthony et al  
Dispersion
0.03  
99+
0.03  
99+
Transparency
Translucent, Opaque  
Transparent  
Refractive Index
1.610-1.650  
1.974-1.984  
Optic Character
-  
-  
Crystal System
Triclinic  
-  
Birefringence
0.040  
-9999  
Clarity
Translucent  
Transparent  
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Semi Precious Gemstones

Semi Precious Gemstones

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