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Dravite
Dravite
☒

Polyhalite
Polyhalite
☒



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Dravite
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Polyhalite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
Very strong: pale yellow colorless
0.02
Transparent
1.614-1.666
-
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
0.014-0.032
Transparent
 
Vitreous, Resinous
-
0.02
-
1.546-1.548
-
Triclinic
0.021
-

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Hydrogrossular
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Polyhalite Vs Falcons Eye
Polyhalite
Fluorapatite
Polyhalite Vs Fluorapatite
Polyhalite
Gadolinium Gallium Garnet
Polyhalite Vs Gadolinium Gall...

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