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Hurlbutite
Hurlbutite
☒

Vlasovite
Vlasovite
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Hurlbutite
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Vlasovite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.90
Conchoidal
None
6
CaBe 2(PO 4) 2Michael O’Donoghue , Gems, Sixth Edition (2006)
 
Brittle
Nearly insoluble in HCl and HNO3
-
2.97
Conchoidal
Distinct on {010}
6
-