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Precious Opal
Precious Opal

Blue John
Blue John



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Precious Opal
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Blue John

Precious Opal and Blue John Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
1.98-2.25
Conchoidal
None
5-6.5
SiO 2 · nH 2OGemdat.org , Management Team (2012)
 
-
-
-
3.00-3.25
-
Perfect
-9999
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Precious Opal and Blue John Chemical Formula

While comparing Precious Opal 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 Precious Opal and Blue John chemical formula.

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Precious Opal and Blue John Specific Gravity

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