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Heliotrope
Heliotrope
☒

Kyanite
Kyanite
☒



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Heliotrope
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Kyanite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.61
-
None
6.5-7
SiO2
 
Brittle
-
-
3.53-3.65
Splintery
[100] perfect [010] imperfect with 79° angle between
4-7
Al2SiO5

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Super Seven Crystals
Richterite
Richterite
Flint
Flint
Kyanite
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Kyanite Vs Trinitite
Kyanite
Zinnwaldite
Kyanite Vs Zinnwaldite

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