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Blue John
Blue John

Cryolite
Cryolite



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Blue John
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Cryolite

Blue John and Cryolite Physical Properties

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
Soluble
-
2.97
Uneven
None observed
2.5
Na 3AlF 6Ulrich Henn and Claudio C.

Blue John and Cryolite Chemical Formula

While comparing Blue John and Cryolite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Blue John and Cryolite chemical formula.

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Blue John and Cryolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Blue John and Cryolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John Vs Cryolite during the identification of gemstone. Specific gravity of Blue John is whereas that of Cryolite is .