Shigaite and Dravite Physical Properties

Shigaite and Dravite Chemical Formula

While comparing Shigaite 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 Shigaite and Dravite chemical formula.

• Chemical formula of Shigaite- Pb6Cu3BiS4
• Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Shigaite and Dravite Specific Gravity

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