Pezzottaite and Goethite Physical Properties

Pezzottaite

Goethite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

HCl soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.144.27-4.29

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Imperfect; basal

Perfect {010}

1.7 Mohs Hardness

7.5-85-5.5

2 10

1.8 Chemical Composition

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

FeO(OH)Arthur Thomas , Gemstones (2009)

Pezzottaite and Goethite Chemical Formula

While comparing Pezzottaite 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 Pezzottaite and Goethite chemical formula.

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

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Pezzottaite and Goethite Specific Gravity

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