Ruby and Zoisite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.97-4.05
  
3.20-3.50
  
Fracture
Conchoidal
  
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Even
  
Cleavage
No true cleavage
  
Perfect {010} imperfect {100}
  
Mohs Hardness
9
  
6-7
  
Chemical Composition
Al 2 O 3
  
Ca2Al3(SiO4)3(OH)
  
Ruby and Zoisite Chemical Formula
While comparing Ruby and Zoisite 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 Ruby and Zoisite chemical formula.
- Chemical formula of Ruby- Al 2 O 3
- Chemical formula of Zoisite- Ca2Al3(SiO4)3(OH)
Ruby and Zoisite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ruby and Zoisite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Zoisite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 3.20-3.50 whereas that of Zoisite is 3.20-3.50.
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