Apatite and Purpurite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.16-3.23
3.2-3.4
Fracture
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven
Uneven, UnevenArthur Thomas, Gemstones (2009), Brittle
Cleavage
[0001] indistinct, [1010] indistinct
[100] [001] perfect
Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Apatite and Purpurite Chemical Formula
While comparing Apatite and Purpurite 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 Purpurite 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 Purpurite- MnPO 4Walter Schumann , Gemstones of the world (2001) More from other references
Apatite and Purpurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apatite and Purpurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Purpurite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 3.2-3.4 whereas that of Purpurite is 3.2-3.4.