Precious Opal and Blue John Physical Properties

Precious Opal and Blue John Chemical Formula

While comparing Precious Opal 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 Precious Opal and Blue John chemical formula.

• Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Precious Opal and Blue John Specific Gravity

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