Dravite and Star Sapphire Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.03-3.18
3.90-4.05
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Not Available
Cleavage
{???} Indistinct
Not Available
Mohs Hardness
7-7.5
Not Available
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Al 2O 3Ulrich Henn and Claudio C.
Dravite and Star Sapphire Chemical Formula
While comparing Dravite and Star Sapphire 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 Star Sapphire 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 Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
Dravite and Star Sapphire Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Star Sapphire Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Star Sapphire Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.90-4.05 whereas that of Star Sapphire is 3.90-4.05.