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Blue spinel
Blue spinel
☒

Serendibite
Serendibite
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Blue spinel
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
-9999
-
None
-9999
MgAl2O4
 
-
-
-
3.43-3.44
-
None Observed
6.5-7
Ca 2(Mg,Al) 6(Si,Al,B) 6O 20Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references