Sylvite and Xonotlite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
1.993
  
2.71-2.72
  
Fracture
Uneven, Brittle
  
Handbook of mineralogy (2001), Difficult, Fibrous
  
Cleavage
Perfect on [100], [010], [001]
  
{???} Good
  
Mohs Hardness
2.5
  
6-6.5
  
Chemical Composition
Not Available
  
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Sylvite and Xonotlite Chemical Formula
While comparing Sylvite and Xonotlite 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 Xonotlite chemical formula.
>- Chemical formula of Xonotlite- Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Sylvite and Xonotlite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Sylvite and Xonotlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Sylvite and Xonotlite Optical Properties during the identification of gemstone. Specific gravity of Sylvite is 2.71-2.72 whereas that of Xonotlite is 2.71-2.72.