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Flint
Flint

Blue John
Blue John



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X
Flint
X
Blue John

Flint and Blue John Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
-9999
Uneven
None
-9999
SiO2
 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Flint and Blue John Chemical Formula

While comparing Flint and Blue John 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 Flint and Blue John chemical formula.

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Flint and Blue John Specific Gravity

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