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Blue John
Blue John
☒

Rosasite
Rosasite
☒



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Blue John
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Rosasite
Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
 
Brittle
Effervesces in cold
-
4-4.2
Splintery
Perfect on {100} and {010}
4
CuZn(CO3)(OH)2