Fayalite and Precious Opal Physical Properties

Fayalite and Precious Opal Chemical Formula

While comparing Fayalite and Precious Opal 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 Precious Opal chemical formula.

• Chemical formula of Fayalite- Fe 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)
• Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)

Fayalite and Precious Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Fayalite and Precious Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Fayalite and Precious Opal Optical Properties during the identification of gemstone. Specific gravity of Fayalite is 1.98-2.25 whereas that of Precious Opal is 1.98-2.25.