Dravite and Aragonite Physical Properties
Specific Gravity
3.03-3.18
2.93-2.96
Fracture
Uneven, Irregular, Conchoidal
Subconchoidal, Conchoidal
Cleavage
{???} Indistinct
Distinct on {010}, imperfect {110} and {011}
Mohs Hardness
7-7.5
3.5-4
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dravite and Aragonite Chemical Formula
While comparing Dravite and Aragonite 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 Aragonite 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 Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dravite and Aragonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Aragonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Aragonite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.93-2.96 whereas that of Aragonite is 2.93-2.96.