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