×

Goethite
Goethite
☒

Blue spinel
Blue spinel
☒



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Goethite
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Blue spinel
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
HCl soluble
-
4.27-4.29
Uneven
Perfect {010}
5-5.5
FeO(OH)Arthur Thomas , Gemstones (2009)
 
-
-
-
-9999
-
None
-9999
MgAl2O4

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