Benitoite and Sillimanite Physical Properties
Tenacity
Not Available
Tough
Solubility
Insoluble: HCl
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.61-3.68
3.20-3.26
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Splintery
Cleavage
[10 1 1] poor
{010} perfect
Mohs Hardness
6-6.5
6-7.5
Chemical Composition
BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Benitoite and Sillimanite Chemical Formula
While comparing Benitoite and Sillimanite 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 Benitoite and Sillimanite chemical formula.
- Chemical formula of Benitoite- BaTiSi 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Benitoite and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Benitoite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Benitoite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Benitoite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.