Dravite and Ludlamite Physical Properties

Dravite and Ludlamite Chemical Formula

While comparing Dravite and Ludlamite 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 Ludlamite 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 Ludlamite- (Fe2+ ,Mg,Mn2+ ) 3(PO 4) 2 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Dravite and Ludlamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Ludlamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Ludlamite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.1-3.2 whereas that of Ludlamite is 3.1-3.2.