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Cordierite Iolite
Cordierite Iolite
☒

Zinnwaldite
Zinnwaldite
☒



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Cordierite Iolite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.56-2.66
Uneven, ConchoidalWalter Schumann
Distinct
7-7.5
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
 
Elastic
-
-
2.9-3.1
Uneven
Perfect basal {001}
3.5-4.0
-

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