Atacamite and Sardonyx Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.745-3.776
  
2.55-2.70
  
Fracture
Conchoidal, Conchoidal, Brittle
  
Not Available
  
Cleavage
Perfect on {010}, fair on {101}
  
Not Available
  
Mohs Hardness
3-3.5
  
6.5-7
  
Chemical Composition
Cu2Cl(OH)3
  
SiO 2Ulrich Henn and Claudio C.
  
Atacamite and Sardonyx Chemical Formula
While comparing Atacamite and Sardonyx 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 Atacamite and Sardonyx chemical formula.
- Chemical formula of Atacamite- Cu2Cl(OH)3
- Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.
Atacamite and Sardonyx Specific Gravity
Another important criteria for qualitative analysis of gemstones is Atacamite and Sardonyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Atacamite and Sardonyx Optical Properties during the identification of gemstone. Specific gravity of Atacamite is 2.55-2.70 whereas that of Sardonyx is 2.55-2.70.