Goethite and Diaspore Physical Properties
Tenacity
Not Available
Very brittle
Solubility
HCl soluble
insoluble
Durability
Not Available
Not Available
Specific Gravity
4.27-4.29
3.30-3.40
Fracture
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Conchoidal, Brittle, Conchoidal
Cleavage
Perfect {010}
{010} perfect, {110} distinct, {100} in traces
Mohs Hardness
5-5.5
6.5-7
Chemical Composition
FeO(OH)Arthur Thomas , Gemstones (2009)
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Goethite and Diaspore Chemical Formula
While comparing Goethite and Diaspore 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 Diaspore chemical formula.
- Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
- Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Goethite and Diaspore Specific Gravity
Another important criteria for qualitative analysis of gemstones is Goethite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Goethite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.