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Cacoxenite
Cacoxenite
☒

Blue John
Blue John
☒



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Cacoxenite
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Blue John
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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.2-2.6
Uneven
None
3-4
(Fe+++,Al)25(PO4)17O6(OH)12•75(H2O)
 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

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Blue John
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Blue John Vs Zinnwaldite

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