Hyalite and Blue John Physical Properties

Hyalite and Blue John Chemical Formula

While comparing Hyalite 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 Hyalite and Blue John chemical formula.

• Chemical formula of Hyalite- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Hyalite and Blue John Specific Gravity

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