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Precious Opal
Phosphosiderite
Phosphosiderite and Precious Opal Optical Properties


Optical Properties
Luster
-  
Vitreous  
Pleochroism
-  
Pale rose-red carmine-red colorlessAnthony et al  
Dispersion
0.01  
99+
0.04  
36
Transparency
Transparent, Translucent  
Transparent  
Refractive Index
1.370-1.470  
1.692-1.739  
Optic Character
-  
-  
Crystal System
-  
-  
Birefringence
-9999  
0.240  
Clarity
Transparent  
Transparent  
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