Tourmaline and Blue John Physical Properties

Tourmaline and Blue John Chemical Formula

While comparing Tourmaline 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 Tourmaline and Blue John chemical formula.

• Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Tourmaline and Blue John Specific Gravity

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