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Heliotrope
Heliotrope
☒

Covellite
Covellite
☒



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Heliotrope
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Covellite
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Optical Properties

Luster

Pleochroism

Dispersion

Transparency

Refractive Index

Optic Character

Crystal System

Birefringence

Clarity

 
Vitreous
-
0.01
-
1.53-1.54
-
Trigonal
0.004
-
 
Resinous
Marked
0.08
OpaqueAnthony et al
1.45-2.62
-
Hexagonal
-9999
OpaqueAnthony et al

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Green Gemstones

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Super Seven Crystals
Richterite
Richterite
Flint
Flint
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Covellite
Zinnwaldite
Covellite Vs Zinnwaldite

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