Lazurite and Xonotlite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Soluble
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.75
  
2.71-2.72
  
Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Handbook of mineralogy (2001), Difficult, Fibrous
  
Cleavage
Imperfect on {110}
  
{???} Good
  
Mohs Hardness
5.5
  
6-6.5
  
Chemical Composition
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
  
Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Lazurite and Xonotlite Chemical Formula
While comparing Lazurite 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 Lazurite and Xonotlite chemical formula.
- Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
- Chemical formula of Xonotlite- Ca 6Si 6O 17(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Lazurite and Xonotlite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Lazurite and Xonotlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Xonotlite Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 2.71-2.72 whereas that of Xonotlite is 2.71-2.72.