Augite and Blue John Physical Properties

Augite and Blue John Chemical Formula

While comparing Augite 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 Augite and Blue John chemical formula.

• Chemical formula of Augite- (Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Augite and Blue John Specific Gravity

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