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Plumbogummite
Jasper
Jasper and Plumbogummite Optical Properties


Optical Properties
Luster
Resinous  
Vitreous  
Pleochroism
None  
-  
Dispersion
0.04  
39
0.01  
99+
Transparency
-  
Opaque  
Refractive Index
1.653-1.688  
1.540  
Optic Character
-  
-  
Crystal System
Trigonal  
Trigonal  
Birefringence
-9999  
-9999  
Clarity
-  
OpaqueHerve Nicolas Lazzarelli  
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