Sillimanite and Marialite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.20-3.26
2.50
Fracture
Splintery
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
{010} perfect
Distinct on {100} and {110}
Mohs Hardness
6-7.5
5.5-6
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
Sillimanite and Marialite Chemical Formula
While comparing Sillimanite and Marialite 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 Marialite chemical formula.
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Marialite- 3NaAlSi 3O 8 · NaClAnthony et al , Handbook of mineralogy (2001)
Sillimanite and Marialite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sillimanite and Marialite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Marialite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.50 whereas that of Marialite is 2.50.