Kyanite and Apatite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.53-3.65
3.16-3.23
Fracture
Splintery, Brittle, Metallic
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven
Cleavage
[100] perfect [010] imperfect with 79° angle between
[0001] indistinct, [1010] indistinct
Chemical Composition
Not Available
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Kyanite and Apatite Chemical Formula
While comparing Kyanite and Apatite 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 Kyanite and Apatite 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
Kyanite and Apatite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Kyanite and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Kyanite and Apatite Optical Properties during the identification of gemstone. Specific gravity of Kyanite is 3.16-3.23 whereas that of Apatite is 3.16-3.23.