Apatite and Diopside Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Not Available
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.16-3.23
  
3.22-3.40
  
Fracture
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven
  
Conchoidal, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
  
Cleavage
[0001] indistinct, [1010] indistinct
  
Distinct/good on {110}
  
Mohs Hardness
5
  
5-6
  
Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
  
CaMgSi2O6
  
Apatite and Diopside Chemical Formula
While comparing Apatite and Diopside 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 Apatite and Diopside chemical formula.
- Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Diopside- CaMgSi2O6
Apatite and Diopside Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apatite and Diopside Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Diopside Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.22-3.40 whereas that of Diopside is 3.22-3.40.