Star Sapphire and Herderite Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.90-4.05
  
2.90-3.02
  
Fracture
Not Available
  
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Cleavage
Not Available
  
Indistinct on {110}
  
Mohs Hardness
Not Available
  
5-5.5
  
Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
  
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
  
Star Sapphire and Herderite Chemical Formula
While comparing Star Sapphire 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 Star Sapphire and Herderite chemical formula.
- Chemical formula of Star Sapphire- Al 2O 3Ulrich Henn and Claudio C.
- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
Star Sapphire and Herderite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Star Sapphire and Herderite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Star Sapphire and Herderite Optical Properties during the identification of gemstone. Specific gravity of Star Sapphire is 2.90-3.02 whereas that of Herderite is 2.90-3.02.