Fayalite and Pyrite Physical Properties

Fayalite and Pyrite Chemical Formula

While comparing Fayalite and Pyrite 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 Fayalite and Pyrite chemical formula.

• Chemical formula of Fayalite- Fe 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Pyrite- FeS 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Fayalite and Pyrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fayalite and Pyrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fayalite and Pyrite Optical Properties during the identification of gemstone. Specific gravity of Fayalite is 5.00-5.20 whereas that of Pyrite is 5.00-5.20.