Onyx and Steatite Physical Properties

Onyx and Steatite Chemical Formula

While comparing Onyx and Steatite 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 Onyx and Steatite chemical formula.

• Chemical formula of Onyx- SiO₂
• Chemical formula of Steatite- Mg 3Si 4O 10(OH) 2Gemdat.org , Management Team (2012)

Onyx and Steatite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Onyx and Steatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Onyx and Steatite Optical Properties during the identification of gemstone. Specific gravity of Onyx is 2.20-2.80 whereas that of Steatite is 2.20-2.80.