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Nepheline
Nepheline

Brucite
Brucite



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Nepheline
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Brucite
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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
 
Vitreous, Pearly
-
0.03
TransparentMichael O’Donoghue
1.56-1.60
-
Trigonal
0.010-0.020
TransparentMichael O’Donoghue