Herderite and Sardonyx Physical Properties
Tenacity
Not Available
  
Not Available
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
2.90-3.02
  
2.55-2.70
  
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
  
Not Available
  
Cleavage
Indistinct on {110}
  
Not Available
  
Mohs Hardness
5-5.5
  
6.5-7
  
Chemical Composition
CaBePO 4(F,OH)Ulrich Henn and Claudio C.
  
SiO 2Ulrich Henn and Claudio C.
  
Herderite and Sardonyx Chemical Formula
While comparing Herderite and Sardonyx 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 Herderite and Sardonyx chemical formula.
- Chemical formula of Herderite- CaBePO 4(F,OH)Ulrich Henn and Claudio C.
- Chemical formula of Sardonyx- SiO 2Ulrich Henn and Claudio C.
Herderite and Sardonyx Specific Gravity
Another important criteria for qualitative analysis of gemstones is Herderite and Sardonyx Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Herderite and Sardonyx Optical Properties during the identification of gemstone. Specific gravity of Herderite is 2.55-2.70 whereas that of Sardonyx is 2.55-2.70.