Sillimanite and Albite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.20-3.26
2.60-2.65
Fracture
Splintery
Uneven, Uneven, Gems, Sixth Edition (2006), Uneven, Conchoidal
Cleavage
{010} perfect
Perfect on {001}, very good on {010}, imperfect on {110}
Mohs Hardness
6-7.5
6-6.5
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Sillimanite and Albite Chemical Formula
While comparing Sillimanite and Albite 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 Albite chemical formula.
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Albite- NaAlSi 3O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Sillimanite and Albite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sillimanite and Albite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sillimanite and Albite Optical Properties during the identification of gemstone. Specific gravity of Sillimanite is 2.60-2.65 whereas that of Albite is 2.60-2.65.