Goethite and Foitite Physical Properties

Goethite

Foitite

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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)

3.17

None

Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)

Goethite and Foitite Chemical Formula

While comparing Goethite and Foitite 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 Foitite chemical formula.

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Goethite and Foitite Specific Gravity

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