Scapolite and Blue John Physical Properties

Scapolite and Blue John Chemical Formula

While comparing Scapolite 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 Scapolite and Blue John chemical formula.

• Chemical formula of Scapolite- Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references
• Chemical formula of Blue John- CaF 2Michael O’Donoghue , Gems, Sixth Edition (2006)

Scapolite and Blue John Specific Gravity

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