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Dallasite
Dallasite
☒

Hercynite
Hercynite
☒



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Dallasite
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Hercynite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.01
-
1.540
-
-
0.008-0.010
-
 
Vitreous
-
0.03
Translucent
1.80-1.83
-
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
-9999
Translucent

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Hercynite Vs Ekanite

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