Phenakite and Sillimanite Physical Properties
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.90-2.98
3.20-3.26
Fracture
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle
Splintery
Cleavage
Distinct on {11 2 0}, imperfect on {10 1 1}
{010} perfect
Mohs Hardness
7.5-8
6-7.5
Chemical Composition
Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Phenakite and Sillimanite Chemical Formula
While comparing Phenakite 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 Phenakite and Sillimanite chemical formula.
- Chemical formula of Phenakite- Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
- Chemical formula of Sillimanite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Phenakite and Sillimanite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Phenakite and Sillimanite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Phenakite and Sillimanite Optical Properties during the identification of gemstone. Specific gravity of Phenakite is 3.20-3.26 whereas that of Sillimanite is 3.20-3.26.