Ruby and Sellaite Physical Properties
Tenacity
Brittle
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.97-4.05
  
3.14-3.16
  
Fracture
Conchoidal
  
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
  
Cleavage
No true cleavage
  
Perfect on {010} and {110}
  
Mohs Hardness
9
  
5-5.5
  
Chemical Composition
Al 2 O 3
  
MgF 2Ulrich Henn and Claudio C.
  
Ruby and Sellaite Chemical Formula
While comparing Ruby and Sellaite 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 Sellaite chemical formula.
- Chemical formula of Ruby- Al 2 O 3
- Chemical formula of Sellaite- MgF 2Ulrich Henn and Claudio C.
Ruby and Sellaite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ruby and Sellaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Sellaite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 3.14-3.16 whereas that of Sellaite is 3.14-3.16.
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