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Goethite
Goethite

Umbalite
Umbalite



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Goethite
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Umbalite

Goethite and Umbalite Physical Properties

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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)
 
-
-
-
3.62-4.33
Uneven
Indiscernible
7-7.5
Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)

Goethite and Umbalite Chemical Formula

While comparing Goethite and Umbalite 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 Umbalite chemical formula.

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Goethite and Umbalite Specific Gravity

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