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Caledonite and Blue John Physical Properties


Blue John and Caledonite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
5.6-5.76   
3.00-3.25   

Fracture
Uneven, UnevenAnthony et al, Handbook of mineralogy (2001)   
Not Available   

Cleavage
[001] perfect; [100] distinct   
Not Available   

Mohs Hardness
2.5-3   
Not Available   

Chemical Composition
Pb 5Cu 2(SO 4) 3(CO 3)(OH) 6Anthony et al , Handbook of mineralogy (2001)   
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)   

Optical Properties >>
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Caledonite and Blue John Chemical Formula

While comparing Caledonite 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 Caledonite and Blue John chemical formula.

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Caledonite and Blue John Specific Gravity

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

Blue Gemstones

Blue Gemstones


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