Chromite and Powellite Physical Properties

Chromite

Powellite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.5-4.84.23

1 7.18

1.5 Fracture

Uneven

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

1.6 Cleavage

None, parting may develop along {111}

{111} Distinct

1.7 Mohs Hardness

5.53.5-4

2 10

1.8 Chemical Composition

Fe++Cr2O4

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

Chromite and Powellite Chemical Formula

While comparing Chromite and Powellite 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 Chromite and Powellite chemical formula.

Chemical formula of Chromite- Fe++Cr2O4
Chemical formula of Powellite- CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Chromite and Powellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chromite and Powellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chromite and Powellite Optical Properties during the identification of gemstone. Specific gravity of Chromite is 4.23 whereas that of Powellite is 4.23.