Cobaltite and Blue John Physical Properties

Cobaltite and Blue John Chemical Formula

While comparing Cobaltite 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 Cobaltite and Blue John chemical formula.

• Chemical formula of Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Cobaltite and Blue John Specific Gravity

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