Kornerupine and Blue John Physical Properties

Kornerupine and Blue John Chemical Formula

While comparing Kornerupine 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 Kornerupine and Blue John chemical formula.

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

Kornerupine and Blue John Specific Gravity

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