Obsidian and Dravite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.35-2.60
3.03-3.18
Fracture
Conchoidal, ConchoidalWalter Schumann, Conchoidal
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
Not Available
{???} Indistinct
Mohs Hardness
5-5.5
7-7.5
Chemical Composition
Not Available
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Obsidian and Dravite Chemical Formula
While comparing Obsidian 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 Obsidian and Dravite 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)
Obsidian and Dravite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Obsidian and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Obsidian and Dravite Optical Properties during the identification of gemstone. Specific gravity of Obsidian is 3.03-3.18 whereas that of Dravite is 3.03-3.18.