Dravite and Sellaite Physical Properties

Dravite and Sellaite Chemical Formula

While comparing Dravite and Sellaite 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 Dravite and Sellaite chemical formula.

• Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
• Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.

Dravite and Sellaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.