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Nepheline
Nepheline

Hessonite
Hessonite



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Nepheline
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Hessonite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous, Greasy
-
0.01
Transparent, Translucent
1.529-1.547
-
Hexagonal
0.003-0.004
Transparent
 
-
-
0.03
-
1.742-1.748
-
-
-9999
TransparentUlrich Henn and Claudio C. Milisenda