Black Opal and Fayalite Physical Properties

Black Opal and Fayalite Chemical Formula

While comparing Black Opal and Fayalite 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 Black Opal and Fayalite chemical formula.

• Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
• Chemical formula of Fayalite- Fe 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Black Opal and Fayalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 4.392 whereas that of Fayalite is 4.392.