Beryllonite and Dravite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.79-2.87
3.03-3.18
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
{???} Indistinct
Mohs Hardness
5.5-6
7-7.5
Chemical Composition
NaBePO 4Michael 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)
Beryllonite and Dravite Chemical Formula
While comparing Beryllonite 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 Beryllonite and Dravite chemical formula.
- Chemical formula of Beryllonite- NaBePO 4Michael 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)
Beryllonite and Dravite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Beryllonite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Beryllonite and Dravite Optical Properties during the identification of gemstone. Specific gravity of Beryllonite is 3.03-3.18 whereas that of Dravite is 3.03-3.18.