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Siderite
Demantoid
Demantoid and Siderite Optical Properties


Optical Properties
Luster
Pearly  
Adamantine  
Pleochroism
-  
None  
Dispersion
0.04  
36
0.06  
23
Transparency
Transparent, Translucent  
-  
Refractive Index
1.633-1.875  
1.880-1.890  
Optic Character
-  
-  
Crystal System
Trigonal  
cubic  
Birefringence
0.242  
-9999  
Clarity
Transparent  
TransparentUlrich Henn and Claudio C. Milisenda  
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