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Blue John
Blue John
☒

Aventurine feldspar
Aventurine feldspar
☒



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Blue John
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Aventurine feldspar

Blue John and Aventurine feldspar 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)
 
-
-
-
-9999
-
None
-9999
KAl2(AlSi3O10)(OH)2

Blue John and Aventurine feldspar Chemical Formula

While comparing Blue John and Aventurine feldspar 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 Aventurine feldspar chemical formula.

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Blue John and Aventurine feldspar Specific Gravity

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