Chlorastrolite and Common Opal Physical Properties

Chlorastrolite and Common Opal Chemical Formula

While comparing Chlorastrolite and Common 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 Chlorastrolite and Common Opal chemical formula.

• Chemical formula of Chlorastrolite- Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)
• Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Chlorastrolite and Common Opal Specific Gravity

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