Ruby and Esperite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.97-4.05
  
4.28-4.42
  
Fracture
Conchoidal
  
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Metallic
  
Cleavage
No true cleavage
  
Distinct on [010] and [100] poor on [101]
  
Mohs Hardness
9
  
5-5.5
  
Chemical Composition
Al 2 O 3
  
PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
  
Ruby and Esperite Chemical Formula
While comparing Ruby and Esperite 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 Esperite chemical formula.
- Chemical formula of Ruby- Al 2 O 3
- Chemical formula of Esperite- PbCa 3Zn 4(SiO 4) 4Anthony et al , Handbook of mineralogy (2001)
Ruby and Esperite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ruby and Esperite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Esperite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 4.28-4.42 whereas that of Esperite is 4.28-4.42.
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