Grossular and Onyx Physical Properties

Grossular and Onyx Chemical Formula

While comparing Grossular 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 Grossular and Onyx chemical formula.

• Chemical formula of Grossular- Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
• Chemical formula of Onyx- SiO₂

Grossular and Onyx Specific Gravity

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