Dravite and Arfvedsonite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.03-3.18
3.3-3.5
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Uneven, Brittle, Metallic, Brittle, Metallic
Cleavage
{???} Indistinct
Perfect on [110]
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
NaNa2(Fe++4Fe+++)Si8O22(OH)2
Dravite and Arfvedsonite Chemical Formula
While comparing Dravite and Arfvedsonite 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 Arfvedsonite 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 Arfvedsonite- NaNa2(Fe++4Fe+++)Si8O22(OH)2
Dravite and Arfvedsonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Arfvedsonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Arfvedsonite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.3-3.5 whereas that of Arfvedsonite is 3.3-3.5.