Colemanite and Dravite Physical Properties

Colemanite and Dravite Chemical Formula

While comparing Colemanite 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 Colemanite and Dravite chemical formula.

• Chemical formula of Colemanite- Ca 2B 6O 11 · 5H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references
• Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Colemanite and Dravite Specific Gravity

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