Crocoite and Onyx Physical Properties

Crocoite and Onyx Chemical Formula

While comparing Crocoite and Onyx 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 Crocoite and Onyx chemical formula.

• Chemical formula of Crocoite- PbCrO 4Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
• Chemical formula of Onyx- SiO₂

Crocoite and Onyx Specific Gravity

Another important criteria for qualitative analysis of gemstones is Crocoite and Onyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Crocoite and Onyx Optical Properties during the identification of gemstone. Specific gravity of Crocoite is 2.55-2.70 whereas that of Onyx is 2.55-2.70.