Dravite and Hardystonite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.03-3.18
3.396-3.443
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Brittle, Metallic
Cleavage
{???} Indistinct
[001] good, [100] and [110] fair
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Dravite and Hardystonite Chemical Formula
While comparing Dravite and Hardystonite 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 Hardystonite 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 Hardystonite- Ca 2ZnSi 2O 7Anthony et al , Handbook of mineralogy (2001)
Dravite and Hardystonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Hardystonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Hardystonite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.396-3.443 whereas that of Hardystonite is 3.396-3.443.