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Bornite
Bornite

Blue John
Blue John



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Bornite
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Blue John

Bornite and Blue John Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
5.06-5.083.00-3.25
Amber
1 7.18
1.5 Fracture
Uneven, Subconchoidal, Conchoidal, Brittle
Not Available
1.6 Cleavage
Poor on [111].
Not Available
1.7 Mohs Hardness
3-3.25Not Available
Amber
2 10
1.8 Chemical Composition
Cu5FeS4
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Bornite and Blue John Chemical Formula

While comparing Bornite 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 Bornite and Blue John chemical formula.

  • Chemical formula of Bornite- Cu5FeS4
  • Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Bornite and Blue John Specific Gravity

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