Ruby and Herderite Physical Properties
Tenacity
Brittle
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.97-4.05
  
2.90-3.02
  
Fracture
Conchoidal
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
No true cleavage
  
Indistinct on {110}
  
Mohs Hardness
9
  
5-5.5
  
Chemical Composition
Al 2 O 3
  
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
  
Ruby and Herderite Chemical Formula
While comparing Ruby and Herderite 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 Herderite chemical formula.
- Chemical formula of Ruby- Al 2 O 3
- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Ruby and Herderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Ruby and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ruby and Herderite Optical Properties during the identification of gemstone. Specific gravity of Ruby is 2.90-3.02 whereas that of Herderite is 2.90-3.02.
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