Lazurite and Blue John Physical Properties

Lazurite and Blue John Chemical Formula

While comparing Lazurite 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 Lazurite and Blue John chemical formula.

• Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Lazurite and Blue John Specific Gravity

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