Precious Opal and Nosean Physical Properties

Precious Opal and Nosean Chemical Formula

While comparing Precious Opal and Nosean 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 Precious Opal and Nosean chemical formula.

• Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
• Chemical formula of Nosean- Na 8Al 6Si 6O 24(SO 4) · H 2OAnthony et al , Handbook of Mineralogy (2001)

Precious Opal and Nosean Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Nosean Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Nosean Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.30-2.40 whereas that of Nosean is 2.30-2.40.