Powellite and Goethite Physical Properties

Powellite

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

4.234.27-4.29

1 7.18

1.5 Fracture

UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal

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

1.6 Cleavage

{111} Distinct

Perfect {010}

1.7 Mohs Hardness

3.5-45-5.5

2 10

1.8 Chemical Composition

CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

FeO(OH)Arthur Thomas , Gemstones (2009)

Powellite and Goethite Chemical Formula

While comparing Powellite 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 Powellite and Goethite chemical formula.

Chemical formula of Powellite- CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)

Compare Blue Gemstones

Powellite Vs Rock Crystal

Powellite Vs Sanidine

Powellite Vs Rubellite

Powellite and Goethite Specific Gravity

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