Goethite and Anorthite Physical Properties
Tenacity
Not Available
Brittle
Solubility
HCl soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.27-4.29
2.77
Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Uneven, Uneven, Gems, Sixth Edition (2006)
Cleavage
Perfect {010}
Perfect [001] good [010] poor [110]
Mohs Hardness
5-5.5
6-6.5
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Goethite and Anorthite Chemical Formula
While comparing Goethite and Anorthite 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 Anorthite chemical formula.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
- Chemical formula of Anorthite- CaAl 2Si 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
Goethite and Anorthite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Goethite and Anorthite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Anorthite Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.77 whereas that of Anorthite is 2.77.