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Blue John
Blue John

Uvite
Uvite



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Blue John
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Uvite

Blue John and Uvite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
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-
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3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
 
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-
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2.97-3.14
Uneven, Conchoidal
{1011} Indistinct
-9999
Ca(Mg 3)MgAl 5(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Blue John and Uvite Chemical Formula

While comparing Blue John and Uvite 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 Uvite chemical formula.

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Blue John and Uvite Specific Gravity

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