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Glaucophane
Glaucophane

Blue John
Blue John



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Glaucophane
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Blue John

Glaucophane and Blue John 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
3-3.153.00-3.25
Amber
1 7.18
1.5 Fracture
Conchoidal, Brittle, Conchoidal
Not Available
1.6 Cleavage
Good on [110] and on [001]
Not Available
1.7 Mohs Hardness
6.0-6.5Not Available
Amber
2 10
1.8 Chemical Composition
[ ]Na2(Mg3Al2)Si8O22(OH)2
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Glaucophane and Blue John Chemical Formula

While comparing Glaucophane 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 Glaucophane and Blue John chemical formula.

  • Chemical formula of Glaucophane- [ ]Na2(Mg3Al2)Si8O22(OH)2
  • Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Glaucophane and Blue John Specific Gravity

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