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Gahnospinel
Gahnospinel
☒

Zinnwaldite
Zinnwaldite
☒



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Gahnospinel
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Zinnwaldite
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.65-4.55
Conchoidal
None, but may exhibit slight parting
7.5-8
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
 
Elastic
-
-
2.9-3.1
Uneven
Perfect basal {001}
3.5-4.0
-

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