Goethite and Hematite Physical Properties
Tenacity
Not Available
Brittle
Solubility
HCl soluble
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.27-4.29
5.00-5.30
Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle
Cleavage
Perfect {010}
None, may show partings on {0001} and {10 1 1}
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
Fe 2O 3Arthur Thomas , Gemstones (2009)
Goethite and Hematite Chemical Formula
While comparing Goethite and Hematite 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 Hematite chemical formula.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
- Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)
Goethite and Hematite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Goethite and Hematite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Hematite Optical Properties during the identification of gemstone. Specific gravity of Goethite is 5.00-5.30 whereas that of Hematite is 5.00-5.30.