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Glaucophane
Glaucophane
☒

Sardonyx
Sardonyx
☒



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Glaucophane
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3-3.15
Conchoidal
Good on [110] and on [001]
6.0-6.5
[ ]Na2(Mg3Al2)Si8O22(OH)2
 
-
-
-
2.55-2.70
-
None
6.5-7
SiO 2Ulrich Henn and Claudio C.

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