Ruby and Hibonite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.97-4.05
  
3.84
  
Fracture
Conchoidal
  
Subconchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
  
Cleavage
No true cleavage
  
{0001} good, {10 1 0} parting
  
Mohs Hardness
9
  
7.5-8
  
Chemical Composition
Al 2 O 3
  
(Ca,Ce)(Al,Ti,Mg)12O19
  
Ruby and Hibonite Chemical Formula
While comparing Ruby and Hibonite 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 Hibonite chemical formula.
- Chemical formula of Ruby- Al 2 O 3
- Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19
Ruby and Hibonite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ruby and Hibonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Hibonite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 3.84 whereas that of Hibonite is 3.84.
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