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Staurolite
Staurolite

Indicolite
Indicolite



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Staurolite
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Indicolite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
3.7-3.8
Subconchoidal, Conchoidal
Distinct on {010}
7-7.5
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
 
-
-
-
-9999
-
Indiscernible
-9999
(Na,Li)3Al6Si6O18(BO3)3(OH)4