Cordierite Iolite and Blue John Physical Properties

Cordierite Iolite and Blue John Chemical Formula

While comparing Cordierite Iolite 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 Cordierite Iolite and Blue John chemical formula.

• Chemical formula of Cordierite Iolite- Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Cordierite Iolite and Blue John Specific Gravity

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