Jacobsite and Goethite Physical Properties

Jacobsite

Goethite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

HCl soluble

1.3 Durability

Not Available

1.4 Specific Gravity

4.76-5.034.27-4.29

1 7.18

1.5 Fracture

Conchoidal, Brittle

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

1.6 Cleavage

None

Perfect {010}

1.7 Mohs Hardness

5.5-6.55-5.5

2 10

1.8 Chemical Composition

(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)

FeO(OH)Arthur Thomas , Gemstones (2009)

Jacobsite and Goethite Chemical Formula

While comparing Jacobsite 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 Jacobsite and Goethite chemical formula.

Chemical formula of Jacobsite- (Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Jacobsite and Goethite Specific Gravity

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