Opal and Tourmaline Physical Properties

Opal and Tourmaline Chemical Formula

While comparing Opal and Tourmaline 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 Opal and Tourmaline chemical formula.

• Chemical formula of Opal- SiO₂ · nH₂O
• Chemical formula of Tourmaline- Tourmaline is a series of several different minerals with unique chemical formulas. See The chemical formula of Tourmaline for details.

Opal and Tourmaline Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Tourmaline Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Tourmaline Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.85-3.35 whereas that of Tourmaline is 2.85-3.35.