Rossmanite and Dravite Physical Properties

Rossmanite and Dravite Chemical Formula

While comparing Rossmanite and Dravite 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 Dravite 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 Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Rossmanite and Dravite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rossmanite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rossmanite and Dravite Optical Properties during the identification of gemstone. Specific gravity of Rossmanite is 3.03-3.18 whereas that of Dravite is 3.03-3.18.