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Goethite
Goethite

Annabergite
Annabergite



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Goethite
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Annabergite

Goethite and Annabergite 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)
 
Sectile
-
-
3.07
-
Perfect on {010}, indistinct on {100} and {102}
2
Ni3(AsO4)2•8(H2O)

Goethite and Annabergite Chemical Formula

While comparing Goethite and Annabergite 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 Annabergite chemical formula.

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Goethite and Annabergite Specific Gravity

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