Topaz and Apatite Physical Properties
Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.49-3.57
3.16-3.23
Fracture
Subconchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal to uneven
Cleavage
[001] Perfect
[0001] indistinct, [1010] indistinct
Mohs Hardness
8
5
Chemical Composition
Al2SiO4(F,OH)2
Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Topaz and Apatite Chemical Formula
While comparing Topaz 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 Topaz and Apatite chemical formula.
- Chemical formula of Topaz- Al2SiO4(F,OH)2
- Chemical formula of Apatite- Ca 5(PO 4) 3(F,OH,Cl)Walter Schumann , Gemstones of the world (2001) More from other references
Topaz and Apatite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Topaz and Apatite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Topaz and Apatite Optical Properties during the identification of gemstone. Specific gravity of Topaz is 3.16-3.23 whereas that of Apatite is 3.16-3.23.
