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Riebeckite
Riebeckite
☒

Feldspar
Feldspar
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Riebeckite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
Brittle
-
-
3.28-3.44
Uneven, Splintery
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
5.0-6.0
Na2Fe2+3Fe3+2Si8O22(OH)2
 
-
-
-
2.56-2.75
Uneven, Conchoidal
two or three
6-6.5
KAlSi3O8

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