Heliotrope and Opal Physical Properties

Heliotrope and Opal Chemical Formula

While comparing Heliotrope 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 Heliotrope and Opal chemical formula.

• Chemical formula of Heliotrope- SiO2
• Chemical formula of Opal- SiO₂ · nH₂O

Heliotrope and Opal Specific Gravity

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