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Blue John
Blue John

Dumortierite
Dumortierite



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Blue John
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Dumortierite

Blue John and Dumortierite 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)
 
-
-
-
3.26-3.41
Fibrous, ConchoidalWalter Schumann
Distinct on {100}, poor on {110}; parting on {001}
7-8.5
AlAl6O3BSi3O18

Blue John and Dumortierite Chemical Formula

While comparing Blue John and Dumortierite 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 Dumortierite chemical formula.

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Blue John and Dumortierite Specific Gravity

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