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