Goethite and Dravite Physical Properties

Goethite

Dravite

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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)

3.03-3.18

Uneven, Irregular, Conchoidal

{???} Indistinct

7-7.5

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Goethite and Dravite Chemical Formula

While comparing Goethite and Dravite 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 Dravite chemical formula.

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Goethite and Dravite Specific Gravity

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