Beryllonite and Sillimanite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.79-2.87
3.20-3.26
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Splintery
Cleavage
{010} perfect; {100} good, interrupted; {101} indistinct; {001} in traces
{010} perfect
Mohs Hardness
5.5-6
6-7.5
Chemical Composition
NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Beryllonite and Sillimanite Chemical Formula
While comparing Beryllonite 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 Beryllonite and Sillimanite chemical formula.
- Chemical formula of Beryllonite- NaBePO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Beryllonite and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Beryllonite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Beryllonite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Beryllonite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.