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Austinite
Austinite

Blue John
Blue John



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Austinite
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Blue John

Austinite and Blue John Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Easily soluble in cold dilute HCl
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
4.12
3.00-3.25
1.5 Fracture
Brittle, Uneven, Brittle, Uneven
Not Available
1.6 Cleavage
Good in two directions parallel to the prism faces {110}
Not Available
1.7 Mohs Hardness
4-4.5
Not Available
1.8 Chemical Composition
CaZn(AsO4)(OH)
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Austinite and Blue John Chemical Formula

While comparing Austinite 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 Austinite and Blue John chemical formula.

  • Chemical formula of Austinite- CaZn(AsO4)(OH)
  • Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Austinite and Blue John Specific Gravity

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