Dumortierite and Goethite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
HCl soluble
Durability
Not Available
Not Available
Specific Gravity
3.26-3.41
4.27-4.29
Fracture
Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Cleavage
Distinct on {100}, poor on {110}; parting on {001}
Perfect {010}
Mohs Hardness
7-8.5
5-5.5
Chemical Composition
AlAl6O3BSi3O18
FeO(OH)Arthur Thomas , Gemstones (2009)
Dumortierite and Goethite Chemical Formula
While comparing Dumortierite and Goethite 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 Dumortierite and Goethite chemical formula.
- Chemical formula of Dumortierite- AlAl6O3BSi3O18
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Dumortierite and Goethite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dumortierite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dumortierite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Dumortierite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.