Opal and Apophyllite Physical Properties

Opal and Apophyllite Chemical Formula

While comparing Opal and Apophyllite 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 Apophyllite chemical formula.

• Chemical formula of Opal- SiO₂ · nH₂O
• Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

Opal and Apophyllite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Opal and Apophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Apophyllite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.30-2.50 whereas that of Apophyllite is 2.30-2.50.