Nosean and Common Opal Physical Properties

Nosean and Common Opal Chemical Formula

While comparing Nosean 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 Nosean and Common Opal chemical formula.

• Chemical formula of Nosean- Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)
• Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Nosean and Common Opal Specific Gravity

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