Ruby and Rutile Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Insoluble in acids
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.97-4.05
  
4.20-4.30
  
Fracture
Conchoidal
  
Uneven, ConchoidalArthur Thomas, Gemstones (2009)
  
Cleavage
No true cleavage
  
{110} good, 100 moderate, parting on {092} and {011}
  
Mohs Hardness
9
  
6-6.5
  
Chemical Composition
Al 2 O 3
  
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
  
Ruby and Rutile Chemical Formula
While comparing Ruby and Rutile 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 Rutile chemical formula.
- Chemical formula of Ruby- Al 2 O 3
- Chemical formula of Rutile- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Ruby and Rutile Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ruby and Rutile Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Rutile Optical Properties during the identification of gemstone. Specific gravity of Ruby is 4.20-4.30 whereas that of Rutile is 4.20-4.30.
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