Afghanite and Dumortierite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.55-2.65
3.26-3.41
Fracture
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle, Conchoidal, Brittle
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Cleavage
Perfect {10 1 0}
Distinct on {100}, poor on {110}; parting on {001}
Mohs Hardness
5.5-6
7-8.5
Chemical Composition
(Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
AlAl6O3BSi3O18
Afghanite and Dumortierite Chemical Formula
While comparing Afghanite and Dumortierite 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 Afghanite and Dumortierite chemical formula.
- Chemical formula of Afghanite- (Na,Ca,K) 8(Si,Al) 12O 24(SO 4,Cl,CO 3) 3(H 2O)Arthur Thomas , Gemstones (2009)
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
Afghanite and Dumortierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Afghanite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Afghanite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Afghanite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.