Sylvite and Phenakite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.993
  
2.90-2.98
  
Fracture
Uneven, Brittle
  
Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001), Brittle
  
Cleavage
Perfect on [100], [010], [001]
  
Distinct on {11 2 0}, imperfect on {10 1 1}
  
Mohs Hardness
2.5
  
7.5-8
  
Chemical Composition
Not Available
  
Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
  
Sylvite and Phenakite Chemical Formula
While comparing Sylvite and Phenakite 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 Sylvite and Phenakite chemical formula.
>- Chemical formula of Phenakite- Be 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Sylvite and Phenakite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sylvite and Phenakite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sylvite and Phenakite Optical Properties during the identification of gemstone. Specific gravity of Sylvite is 2.90-2.98 whereas that of Phenakite is 2.90-2.98.