Staurolite and Dumortierite Physical Properties
Tenacity
Brittle
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.7-3.8
3.26-3.41
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Cleavage
Distinct on {010}
Distinct on {100}, poor on {110}; parting on {001}
Mohs Hardness
7-7.5
7-8.5
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
AlAl6O3BSi3O18
Staurolite and Dumortierite Chemical Formula
While comparing Staurolite 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 Staurolite and Dumortierite chemical formula.
- Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
Staurolite and Dumortierite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Staurolite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.