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