Opal and White Opal Physical Properties

Opal and White Opal Chemical Formula

While comparing Opal and White 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 Opal and White Opal chemical formula.

• Chemical formula of Opal- SiO₂ · nH₂O
• Chemical formula of White Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Opal and White Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and White Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and White Opal Optical Properties during the identification of gemstone. Specific gravity of Opal is 1.98-2.50 whereas that of White Opal is 1.98-2.50.