Rhodochrosite and Goethite Physical Properties

Rhodochrosite

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

3.0-3.3

4.27-4.29

1.5 Fracture

Uneven, Conchoidal, Conchoidal to uneven, Brittle

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

1.6 Cleavage

On {10 1 1} perfect; parting on {10 1 2}

Perfect {010}

1.7 Mohs Hardness

3.5-4

5-5.5

1.8 Chemical Composition

MnCO₃

FeO(OH)Arthur Thomas , Gemstones (2009)

Rhodochrosite and Goethite Chemical Formula

While comparing Rhodochrosite 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 Rhodochrosite and Goethite chemical formula.

Chemical formula of Rhodochrosite- MnCO₃
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Rhodochrosite and Goethite Specific Gravity

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