×

Petoskey Stone
Petoskey Stone
☒

Polyhalite
Polyhalite
☒



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Petoskey Stone
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Polyhalite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
-
-
0.01
-
-9999
-
Trigonal
-9999
-
 
Vitreous, Resinous
-
0.02
-
1.546-1.548
-
Triclinic
0.021
-

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