Goethite and Brookite Physical Properties

Goethite

Brookite

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Physical Properties

Tenacity

Brittle

Solubility

HCl soluble

Durability

Specific Gravity

4.27-4.293.87-4.14

1 7.18

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Fracture

Uneven

Subconchoidal, Conchoidal

Cleavage

Perfect {010}

Poor on {120}, in traces on {001}

Mohs Hardness

5-5.55.5-6

2 10

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Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Goethite and Brookite Chemical Formula

While comparing Goethite and Brookite 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 Brookite chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Brown Gemstones

Goethite Vs Manganaxinite

Goethite Vs Mellite

Goethite Vs Povondraite

Goethite and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Brookite Optical Properties during the identification of gemstone. Specific gravity of Goethite is 3.87-4.14 whereas that of Brookite is 3.87-4.14.