Williamsite and Sillimanite Physical Properties
Tenacity
Not Available
Tough
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.51-2.63
3.20-3.26
Fracture
Conchoidal, Conchoidal, Handbook of mineralogy (2001)
Splintery
Cleavage
Not Available
{010} perfect
Chemical Composition
(Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Williamsite and Sillimanite Chemical Formula
While comparing Williamsite 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 Williamsite and Sillimanite chemical formula.
- Chemical formula of Williamsite- (Mg,Fe2+ ) 3Si 2O 5(OH) 4Anthony et al , Handbook of mineralogy (2001)
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Williamsite and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Williamsite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Williamsite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Williamsite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.