Hardystonite and Opal Physical Properties

Hardystonite and Opal Chemical Formula

While comparing Hardystonite and 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 Hardystonite and Opal chemical formula.

• Chemical formula of Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
• Chemical formula of Opal- SiO₂ · nH₂O

Hardystonite and Opal Specific Gravity

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