Goethite and Rutile Physical Properties

Goethite

Rutile

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

HCl soluble

Insoluble in acids

1.3 Durability

Not Available

1.4 Specific Gravity

4.27-4.294.20-4.30

1 7.18

1.5 Fracture

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

Uneven, ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect {010}

{110} good, 100 moderate, parting on {092} and {011}

1.7 Mohs Hardness

5-5.56-6.5

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Goethite and Rutile Chemical Formula

While comparing Goethite and Rutile 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 Rutile chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Rutile- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006)

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Goethite and Rutile Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Rutile Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Rutile Optical Properties during the identification of gemstone. Specific gravity of Goethite is 4.20-4.30 whereas that of Rutile is 4.20-4.30.