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Zincite
Willemite
Willemite and Zincite Optical Properties


Optical Properties
Luster
Subadamantine, Resinous   
Vitreous, Resinous   
Pleochroism
Very weak   
NilArthur Thomas   
Dispersion
Not Available   
Not Available   
Transparency
TransparentRobert C. Kammerling, The Journal of Gemmology (1995) More from other references   
Transparent, Translucent   
Refractive Index
2.013-2.029   
1.687-1.723   
Optic Character
Not Available   
Not Available   
Crystal System
Hexagonal   
Trigonal   
Birefringence
0.016   
0.028-0.030   
Clarity
TransparentRobert C. Kammerling   
Transparent   
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