Friedelite and Blue John Physical Properties

Friedelite and Blue John Chemical Formula

While comparing Friedelite 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 Friedelite and Blue John chemical formula.

• Chemical formula of Friedelite- Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Friedelite and Blue John Specific Gravity

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