Chromite and Creedite Physical Properties

Chromite

Creedite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.5-4.82.70

1 7.18

1.5 Fracture

Uneven

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

1.6 Cleavage

None, parting may develop along {111}

Perfect on {100}

1.7 Mohs Hardness

5.54.5

2 10

1.8 Chemical Composition

Fe++Cr2O4

Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

Chromite and Creedite Chemical Formula

While comparing Chromite and Creedite 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 Creedite chemical formula.

Chemical formula of Chromite- Fe++Cr2O4
Chemical formula of Creedite- Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.

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Chromite and Creedite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chromite and Creedite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chromite and Creedite Optical Properties during the identification of gemstone. Specific gravity of Chromite is 2.70 whereas that of Creedite is 2.70.