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Blue John
Blue John

Magnetite
Magnetite



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Blue John
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Magnetite

Blue John and Magnetite Physical Properties

Physical Properties

Tenacity

-
-

Solubility

-
-

Durability

-
-

Specific Gravity

3.00-3.255.2
1 7.18
👆🏻

Fracture

-
Uneven, Conchoidal

Cleavage

Perfect
None

Mohs Hardness

-99995.5-6.5
2 10
👆🏻

Chemical Composition

CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
Fe 3O 4Ulrich Henn and Claudio C.

Blue John and Magnetite Chemical Formula

While comparing Blue John and Magnetite 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 Magnetite chemical formula.

  • Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Magnetite- Fe 3O 4Ulrich Henn and Claudio C.

Blue John and Magnetite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Blue John and Magnetite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Magnetite Optical Properties during the identification of gemstone. Specific gravity of Blue John is 5.2 whereas that of Magnetite is 5.2.