Chromite and Cinnabar Physical Properties

Chromite

Cinnabar

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Physical Properties

Tenacity

Brittle

Slightly sectile

Solubility

1.04 x 10⁻²⁵ g per 100 ml water (Ksp at 25°C = 2 x 10⁻³²)

Durability

Specific Gravity

4.5-4.82

1 7.18

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Fracture

Uneven

Cleavage

None, parting may develop along {111}

Prismatic {10 1 0}, perfect

Mohs Hardness

5.52-2.5

2 10

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Chemical Composition

Fe++Cr2O4

HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Chromite and Cinnabar Chemical Formula

While comparing Chromite and Cinnabar 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 Cinnabar chemical formula.

Chemical formula of Chromite- Fe++Cr2O4
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Chromite and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Chromite and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Chromite and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Chromite is 2 whereas that of Cinnabar is 2.