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Blue John
Blue John

Hurlbutite
Hurlbutite



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Blue John
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Hurlbutite

Blue John and Hurlbutite 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
3.00-3.252.90
Amber
1 7.18
1.5 Fracture
Not Available
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
1.6 Cleavage
Not Available
None
1.7 Mohs Hardness
Not Available6
Amber
2 10
1.8 Chemical Composition
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
CaBe 2(PO 4) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Blue John and Hurlbutite Chemical Formula

While comparing Blue John and Hurlbutite 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 Hurlbutite chemical formula.

  • Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Hurlbutite- CaBe 2(PO 4) 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Blue John and Hurlbutite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Blue John and Hurlbutite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Hurlbutite Optical Properties during the identification of gemstone. Specific gravity of Blue John is 2.90 whereas that of Hurlbutite is 2.90.