Atacamite and Star Ruby Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.745-3.776
  
3.95-4.10
  
Fracture
Conchoidal, Conchoidal, Brittle
  
Uneven, Uneven, Gems, Sixth Edition (2006)
  
Cleavage
Perfect on {010}, fair on {101}
  
Not Available
  
Mohs Hardness
3-3.5
  
Not Available
  
Chemical Composition
Cu2Cl(OH)3
  
Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Atacamite and Star Ruby Chemical Formula
While comparing Atacamite and Star Ruby 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 Star Ruby chemical formula.
- Chemical formula of Atacamite- Cu2Cl(OH)3
- Chemical formula of Star Ruby- Al 2O 3Michael OâDonoghue , Gems, Sixth Edition (2006)
Atacamite and Star Ruby Specific Gravity
Another important criteria for qualitative analysis of gemstones is Atacamite and Star Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Atacamite and Star Ruby Optical Properties during the identification of gemstone. Specific gravity of Atacamite is 3.95-4.10 whereas that of Star Ruby is 3.95-4.10.