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Beudantite and Tourmaline Optical Properties


Optical Properties

Luster
Vitreous   
Vitreous, Resinous   

Pleochroism
typically moderate to strong   
visible   

Dispersion
0.02   
22
Not Available   

Transparency
Transparent, Translucent, Transparent to opaque   
Not Available   

Refractive Index
1.614-1.666   
1.957   

Optic Character
Not Available   
Not Available   

Crystal System
Trigonal   
Trigonal   

Birefringence
0.014-0.040   
0.014   

Clarity
Transparent   
Not Available   

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