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Kyanite
Kyanite

Clintonite
Clintonite



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Kyanite
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Clintonite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
3.53-3.65
Splintery
[100] perfect [010] imperfect with 79° angle between
4-7
Al2SiO5
 
Brittle
-
-
3.0-3.1
-
Perfect on {001}
3.5
Ca(Mg,Al)3(Al3Si)O10(OH)2