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Arfvedsonite
Arfvedsonite

Zinnwaldite
Zinnwaldite



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Arfvedsonite
X
Zinnwaldite
Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Strong: Blue-greens
0.02
-
1.652-1.699
-
monoclinic
-9999
-
 
Pearly, Vitreous
Distinct
0.02
-
1.565-1.625
-
monoclinic
0.040-0.050
-