Dravite and Beryllonite Physical Properties
Specific Gravity
3.03-3.18
2.79-2.87
Fracture
Uneven, Irregular, Conchoidal
Conchoidal
Cleavage
{???} Indistinct
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
Mohs Hardness
7-7.5
5.5-6
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dravite and Beryllonite Chemical Formula
While comparing Dravite and Beryllonite 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 Beryllonite 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 Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dravite and Beryllonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Beryllonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Beryllonite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.79-2.87 whereas that of Beryllonite is 2.79-2.87.