Powellite and Goethite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
HCl soluble
Durability
Not Available
Not Available
Specific Gravity
4.23
4.27-4.29
Fracture
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Cleavage
{111} Distinct
Perfect {010}
Mohs Hardness
3.5-4
5-5.5
Chemical Composition
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
FeO(OH)Arthur Thomas , Gemstones (2009)
Powellite and Goethite Chemical Formula
While comparing Powellite 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 Powellite and Goethite chemical formula.
- Chemical formula of Powellite- CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Powellite and Goethite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Powellite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Powellite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Powellite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.