Opal and Hollandite Physical Properties

Opal and Hollandite Chemical Formula

While comparing Opal and Hollandite 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 Hollandite chemical formula.

• Chemical formula of Opal- SiO₂ · nH₂O
• Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16

Opal and Hollandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Hollandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Hollandite Optical Properties during the identification of gemstone. Specific gravity of Opal is 5.05 whereas that of Hollandite is 5.05.