Rossmanite and Common Opal Physical Properties

Rossmanite and Common Opal Chemical Formula

While comparing Rossmanite 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 Rossmanite and Common Opal chemical formula.

• Chemical formula of Rossmanite- ◻(LiAl 2)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
• Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)

Rossmanite and Common Opal Specific Gravity

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