Vishnevite and Prehnite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
Not Available
  
2.80-2.95
  
Fracture
Brittle, Uneven
  
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
  
Cleavage
Perfect
  
Distinct on [001]
  
Mohs Hardness
5-6
  
6-6.5
  
Chemical Composition
Not Available
  
Ca2Al2Si3O12(OH)
  
Vishnevite and Prehnite Chemical Formula
While comparing Vishnevite and Prehnite 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 Vishnevite and Prehnite chemical formula.
>- Chemical formula of Prehnite- Ca2Al2Si3O12(OH)
Vishnevite and Prehnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Vishnevite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vishnevite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Vishnevite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.