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Sillimanite and Diamond Optical Properties


Optical Properties

Luster
Adamantine  
Vitreous, Subadamantine, Silky  

Pleochroism
None  
Colourless to pale brown to yellow  

Dispersion
0.04  
32
0.02  
99+

Transparency
Transparent, Translucent, Transparent to opaque  
Transparent, Translucent  

Refractive Index
2.417-2.419  
1.653-1.685  

Optic Character
-  
-  

Crystal System
cubic  
Orthorhombic  

Birefringence
-9999  
0.020-0.022  

Clarity
Transparent  
Transparent  

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