Dravite and Franklinite Physical Properties

Dravite and Franklinite Chemical Formula

While comparing Dravite and Franklinite 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 Franklinite 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 Franklinite- (Zn,Mn2+ ,Fe2+ )(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

Dravite and Franklinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Franklinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Franklinite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 5.05-5.22 whereas that of Franklinite is 5.05-5.22.