Apatite and Prehnite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.16-3.23
2.80-2.95
Fracture
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Cleavage
[0001] indistinct, [1010] indistinct
Distinct on [001]
Chemical Composition
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Ca2Al2Si3O12(OH)
Apatite and Prehnite Chemical Formula
While comparing Apatite and Prehnite 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 Prehnite 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 Prehnite- Ca2Al2Si3O12(OH)
Apatite and Prehnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Apatite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Apatite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Apatite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.