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Moldavite
Thulite
Thulite and Moldavite Optical Properties


Optical Properties
Luster
Vitreous   
Vitreous   
Pleochroism
Absent   
Present   
Dispersion
None   
Not Available   
Transparency
Transparent, Translucent   
Opaque, Translucent, Opaque . May be translucent in thin backlit sections.   
Refractive Index
1.48-1.54   
1.695   
Optic Character
Not Available   
Not Available   
Crystal System
Amorphous   
Orthorhombic   
Birefringence
Not Available   
0.006-0.018   
Clarity
Transparent   
OpaqueHerve Nicolas Lazzarelli   
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