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Friedelite and Emerald Optical Properties


Optical Properties

Luster
Vitreous  
-  

Pleochroism
Strong dichroism: yellow green Lazzarelli  
-  

Dispersion
0.01  
99+
0.04  
39

Transparency
Transparent, Translucent, Transparent to translucent  
Translucent  

Refractive Index
1.565-1.602  
1.627-1.663  

Optic Character
-  
-  

Crystal System
Hexagonal  
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m  

Birefringence
0.0040-0.0070  
0.032-0.035  

Clarity
-  
Translucent  

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