Prase and Topaz Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.64-2.69
  
3.49-3.57
  
Fracture
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006)
  
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
  
Cleavage
Not Available
  
[001] Perfect
  
Mohs Hardness
7
  
8
  
Chemical Composition
SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Al2SiO4(F,OH)2
  
Prase and Topaz Chemical Formula
While comparing Prase and 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 Prase and Topaz chemical formula.
- Chemical formula of Prase- SiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Topaz- Al2SiO4(F,OH)2
Prase and Topaz Specific Gravity
Another important criteria for qualitative analysis of gemstones is Prase and Topaz Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Prase and Topaz Optical Properties during the identification of gemstone. Specific gravity of Prase is 3.49-3.57 whereas that of Topaz is 3.49-3.57.