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Blue John
Bustamite
Bustamite and Blue John Optical Properties


Optical Properties
Luster
-  
Vitreous  
Pleochroism
-  
Weak  
Dispersion
0.02  
99+
0.02  
99+
Transparency
Transparent  
Transparent, Translucent  
Refractive Index
1.432-1.436  
1.662-1.707  
Optic Character
-  
-  
Crystal System
-  
Triclinic  
Birefringence
-9999  
0.013-0.015  
Clarity
Transparent  
Transparent  
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Blue Gemstones

Blue Gemstones

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