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Goethite
Goethite

Brookite
Brookite



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Goethite
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Brookite

Goethite and Brookite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
HCl soluble
-
4.27-4.29
Uneven
Perfect {010}
5-5.5
FeO(OH)Arthur Thomas , Gemstones (2009)
 
Brittle
-
-
3.87-4.14
Subconchoidal, Conchoidal
Poor on {120}, in traces on {001}
5.5-6
TiO 2Michael O’Donoghue , 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.

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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 Vs Brookite during the identification of gemstone. Specific gravity of Goethite is whereas that of Brookite is .