Apatite and Cordierite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.16-3.23
2.57-2.66
Fracture
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven
Subconchoidal, Conchoidal, Brittle
Cleavage
[0001] indistinct, [1010] indistinct
Fair on {100}, poor on {001} and {010}
Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Mg2Al4Si5O18
Apatite and Cordierite Chemical Formula
While comparing Apatite and Cordierite 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 Cordierite 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 Cordierite- Mg2Al4Si5O18
Apatite and Cordierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apatite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.