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Heliotrope
Heliotrope
☒

Dravite
Dravite
☒



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Heliotrope
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Dravite
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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
-
 
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

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Green Gemstones

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Super Seven Crystals
Richterite
Richterite
Flint
Flint
Dravite
Cacoxenite
Dravite Vs Cacoxenite
Dravite
Trinitite
Dravite Vs Trinitite
Dravite
Zinnwaldite
Dravite Vs Zinnwaldite

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