Apatite and Pyrophyllite Physical Properties

Apatite and Pyrophyllite Chemical Formula

While comparing Apatite and Pyrophyllite 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 Apatite and Pyrophyllite chemical formula.

• Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
• Chemical formula of Pyrophyllite- Al 2Si 4O 10(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Apatite and Pyrophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Apatite and Pyrophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Pyrophyllite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 2.65-2.90 whereas that of Pyrophyllite is 2.65-2.90.