Cinnabar and Chromite Physical Properties

Cinnabar

Chromite

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Physical Properties

Tenacity

Slightly sectile

Brittle

Solubility

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

Durability

Specific Gravity

24.5-4.8

1 7.18

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Fracture

Uneven

Cleavage

Prismatic {10 1 0}, perfect

None, parting may develop along {111}

Mohs Hardness

2-2.55.5

2 10

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Chemical Composition

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

Fe++Cr2O4

Cinnabar and Chromite Chemical Formula

While comparing Cinnabar and Chromite 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 Cinnabar and Chromite chemical formula.

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

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Cinnabar and Chromite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Chromite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Chromite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 4.5-4.8 whereas that of Chromite is 4.5-4.8.