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Blue John
Blue John

Andradite Garnet
Andradite Garnet



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Blue John
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Andradite Garnet

Blue John and Andradite Garnet Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.00-3.253.8-3.9
Amber
1 7.18
1.5 Fracture
Not Available
Not Available
1.6 Cleavage
Not Available
None
1.7 Mohs Hardness
Not Available6.5-7.5
Amber
2 10
1.8 Chemical Composition
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
Ca3Fe3+2Si3O12

Blue John and Andradite Garnet Chemical Formula

While comparing Blue John and Andradite Garnet 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 Blue John and Andradite Garnet chemical formula.

  • Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Andradite Garnet- Ca3Fe3+2Si3O12

Blue John and Andradite Garnet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Blue John and Andradite Garnet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Andradite Garnet Optical Properties during the identification of gemstone. Specific gravity of Blue John is 3.8-3.9 whereas that of Andradite Garnet is 3.8-3.9.