Bytownite and Sillimanite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.72-2.75
3.20-3.26
Fracture
Uneven, Uneven, Gems, Sixth Edition (2006)
Splintery
Cleavage
Perfect on [001], good on [010], imperfect on [110]
{010} perfect
Mohs Hardness
6-6.5
6-7.5
Chemical Composition
Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Bytownite and Sillimanite Chemical Formula
While comparing Bytownite 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 Bytownite and Sillimanite chemical formula.
- Chemical formula of Bytownite- Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Bytownite and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Bytownite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Bytownite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Bytownite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.