Mimetite and Goethite Physical Properties

Mimetite

Goethite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

HCl soluble

1.3 Durability

Not Available

1.4 Specific Gravity

7.104.27-4.29

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).

1.6 Cleavage

[10 1 1] Imperfect

Perfect {010}

1.7 Mohs Hardness

3.55-5.5

2 10

1.8 Chemical Composition

Pb 5(AsO 4) 3ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

FeO(OH)Arthur Thomas , Gemstones (2009)

Mimetite and Goethite Chemical Formula

While comparing Mimetite and Goethite 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 Mimetite and Goethite chemical formula.

Chemical formula of Mimetite- Pb 5(AsO 4) 3ClMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Mimetite and Goethite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Mimetite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Mimetite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Mimetite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.