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