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Vesuvianite
Danburite
Danburite and Vesuvianite Optical Properties


Optical Properties
Luster
Vitreous, Resinous  
Vitreous, Greasy  
Pleochroism
slight in colored varieties  
Weak: pale yellow yellow  
Dispersion
0.03  
99+
0.02  
99+
Transparency
-  
-  
Refractive Index
1.703-1.752  
1.627-1.639  
Optic Character
-  
Biaxial/+  
Crystal System
tetragonal  
Orthorhombic  
Birefringence
0.004-0.006  
0.006  
Clarity
-  
TransparentUlrich Henn and Claudio C. Milisenda  
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