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Friedelite
Opal
Opal and Friedelite Optical Properties


Optical Properties
Luster
-  
Vitreous, Pearly  
Pleochroism
-  
None  
Dispersion
0.04  
39
0.01  
99+
Transparency
Translucent  
Transparent, Translucent, Transparent to translucent  
Refractive Index
1.627-1.663  
1.37-1.52  
Optic Character
-  
-  
Crystal System
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m  
Trigonal  
Birefringence
0.032-0.035  
-9999  
Clarity
Translucent  
Transparent  
Benefits >>
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