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Prase
Prase

Blue John
Blue John



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X
Prase
X
Blue John

Prase and Blue John Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.64-2.69
-
None
7
SiO 2Michael O’Donoghue , Gems, Sixth Edition (2006)
 
-
-
-
3.00-3.25
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Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Prase and Blue John Chemical Formula

While comparing Prase 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 Prase and Blue John chemical formula.

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Prase and Blue John Specific Gravity

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