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Goethite
Goethite

Mottramite
Mottramite



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Goethite
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Mottramite

Goethite and Mottramite Physical Properties

Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
HCl soluble
-
4.27-4.29
Uneven
Perfect {010}
5-5.5
FeO(OH)Arthur Thomas , Gemstones (2009)
 
Brittle
Soluble
-
5.9
Sub-Conchoidal
None observed
3
PbCu(VO4)(OH)

Goethite and Mottramite Chemical Formula

While comparing Goethite and Mottramite 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 Mottramite chemical formula.

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Goethite and Mottramite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite Vs Mottramite during the identification of gemstone. Specific gravity of Goethite is whereas that of Mottramite is .