Sillimanite and Pyrite Physical Properties
Solubility
Not Available
insoluble in water
Durability
Not Available
Not Available
Specific Gravity
3.20-3.26
5.00-5.20
Fracture
Splintery
Uneven, Conchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle
Cleavage
{010} perfect
Indistinct on {001}; partings on {011} and {111}
Mohs Hardness
6-7.5
6-6.5
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Sillimanite and Pyrite Chemical Formula
While comparing Sillimanite and Pyrite 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 Sillimanite and Pyrite chemical formula.
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Pyrite- FeS 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Sillimanite and Pyrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sillimanite and Pyrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Pyrite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 5.00-5.20 whereas that of Pyrite is 5.00-5.20.