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Goethite
Goethite

Austinite
Austinite



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Goethite
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Austinite

Goethite and Austinite 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
Easily soluble in cold dilute HCl
-
4.12
Uneven
Good in two directions parallel to the prism faces {110}
4-4.5
CaZn(AsO4)(OH)

Goethite and Austinite Chemical Formula

While comparing Goethite and Austinite 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 Austinite chemical formula.

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Goethite and Austinite Specific Gravity

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