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Blue John
Blue John

Kornerupine
Kornerupine



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Blue John
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Kornerupine

Blue John and Kornerupine 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
3.00-3.253.25-3.45
Amber
1 7.18
1.5 Fracture
Not Available
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven
1.6 Cleavage
Not Available
Good on {110}
1.7 Mohs Hardness
Not Available6.5
Amber
2 10
1.8 Chemical Composition
CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Blue John and Kornerupine Chemical Formula

While comparing Blue John and Kornerupine 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 Kornerupine chemical formula.

  • Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Kornerupine- Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Blue John and Kornerupine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Blue John and Kornerupine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Blue John and Kornerupine Optical Properties during the identification of gemstone. Specific gravity of Blue John is 3.25-3.45 whereas that of Kornerupine is 3.25-3.45.