Apophyllite and Blue John Physical Properties

Apophyllite and Blue John Chemical Formula

While comparing Apophyllite 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 Apophyllite and Blue John chemical formula.

• Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Apophyllite and Blue John Specific Gravity

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