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Goethite
Goethite

Mellite
Mellite



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Goethite
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Mellite

Goethite and Mellite 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)
 
-
-
-
1.58-1.60
Conchoidal
{011} Imperfect
2
Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.

Goethite and Mellite Chemical Formula

While comparing Goethite and Mellite 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 Mellite chemical formula.

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Goethite and Mellite Specific Gravity

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