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Obsidian and Blue John Physical Properties


Blue John and Obsidian Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.35-2.60   
3.00-3.25   

Fracture
Conchoidal, ConchoidalWalter Schumann, Conchoidal   
Not Available   

Cleavage
Not Available   
Not Available   

Mohs Hardness
5-5.5   
Not Available   

Chemical Composition
Not Available   
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Obsidian and Blue John Chemical Formula

While comparing Obsidian 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 Obsidian and Blue John chemical formula.

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Obsidian and Blue John Specific Gravity

Another important criteria for qualitative analysis of gemstones is Obsidian and Blue John Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Blue John Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 3.00-3.25 whereas that of Blue John is 3.00-3.25.

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Gems for Sagittarius


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