Sugilite and Dravite Physical Properties
Specific Gravity
2.69-2.79
3.03-3.18
Fracture
Conchoidal
Uneven, Irregular, Conchoidal
Cleavage
Poor on {0001}
{???} Indistinct
Mohs Hardness
5.5-6.5
7-7.5
Chemical Composition
KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Sugilite and Dravite Chemical Formula
While comparing Sugilite 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 Sugilite and Dravite chemical formula.
- Chemical formula of Sugilite- KNa 2(Fe3+ ,Mn3+ ,Al) 2Li 3Si 12O 30Michael OâDonoghue , 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)
Sugilite and Dravite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sugilite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sugilite and Dravite Optical Properties during the identification of gemstone. Specific gravity of Sugilite is 3.03-3.18 whereas that of Dravite is 3.03-3.18.