Goethite and Pezzottaite Physical Properties

Goethite

Pezzottaite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

HCl soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.27-4.292.90-3.14

1 7.18

1.5 Fracture

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

Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

Perfect {010}

Imperfect; basal

1.7 Mohs Hardness

5-5.57.5-8

2 10

1.8 Chemical Composition

FeO(OH)Arthur Thomas , Gemstones (2009)

(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.

Goethite and Pezzottaite Chemical Formula

While comparing Goethite and Pezzottaite 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 Pezzottaite chemical formula.

Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Chemical formula of Pezzottaite- (Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.

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Goethite and Pezzottaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Goethite and Pezzottaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Goethite and Pezzottaite Optical Properties during the identification of gemstone. Specific gravity of Goethite is 2.90-3.14 whereas that of Pezzottaite is 2.90-3.14.