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Blue John
Blue John

Magnesite
Magnesite



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Blue John
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Magnesite

Blue John and Magnesite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Effervesces in hot HCl

Durability

-
-

Specific Gravity

3.00-3.252.92-3.12
1 7.18
👆🏻

Fracture

-
Conchoidal

Cleavage

Perfect
[10 1 1] perfect

Mohs Hardness

-99993.5-4.5
2 10
👆🏻

Chemical Composition

CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
MgCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Blue John and Magnesite Chemical Formula

While comparing Blue John and Magnesite 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 Magnesite chemical formula.

  • Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Magnesite- MgCO 3Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Blue John and Magnesite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Blue John and Magnesite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Magnesite Optical Properties during the identification of gemstone. Specific gravity of Blue John is 2.92-3.12 whereas that of Magnesite is 2.92-3.12.