Nosean and Blue John Physical Properties

Nosean and Blue John Chemical Formula

While comparing Nosean 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 Nosean and Blue John chemical formula.

• Chemical formula of Nosean- Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Nosean and Blue John Specific Gravity

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