Hematite and Goethite Physical Properties

Hematite

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

5.00-5.304.27-4.29

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

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

1.6 Cleavage

None, may show partings on {0001} and {10 1 1}

Perfect {010}

1.7 Mohs Hardness

65-5.5

2 10

1.8 Chemical Composition

Fe 2O 3Arthur Thomas , Gemstones (2009)

FeO(OH)Arthur Thomas , Gemstones (2009)

Hematite and Goethite Chemical Formula

While comparing Hematite 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 Hematite and Goethite chemical formula.

Chemical formula of Hematite- Fe 2O 3Arthur Thomas , Gemstones (2009)
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

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Hematite and Goethite Specific Gravity

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