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Goethite
Goethite

Anorthite
Anorthite



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Goethite
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Anorthite

Goethite and Anorthite 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
-
-
2.77
Uneven
Perfect [001] good [010] poor [110]
6-6.5
CaAl 2Si 2O 8Michael O’Donoghue , Gems, Sixth Edition (2006)

Goethite and Anorthite Chemical Formula

While comparing Goethite and Anorthite 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 Anorthite chemical formula.

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Goethite and Anorthite Specific Gravity

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