Cinnabar and Brookite Physical Properties

Cinnabar

Brookite

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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

23.87-4.14

1 7.18

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Fracture

Uneven

Subconchoidal, Conchoidal

Cleavage

Prismatic {10 1 0}, perfect

Poor on {120}, in traces on {001}

Mohs Hardness

2-2.55.5-6

2 10

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Chemical Composition

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

TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Cinnabar and Brookite Chemical Formula

While comparing Cinnabar and Brookite 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 Brookite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Cinnabar and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Brookite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 3.87-4.14 whereas that of Brookite is 3.87-4.14.