Brookite and Cinnabar Physical Properties

Brookite

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

3.87-4.142

1 7.18

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Fracture

Subconchoidal, Conchoidal

Uneven

Cleavage

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

Prismatic {10 1 0}, perfect

Mohs Hardness

5.5-62-2.5

2 10

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Chemical Composition

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

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

Brookite and Cinnabar Chemical Formula

While comparing Brookite 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 Brookite and Cinnabar chemical formula.

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

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Brookite and Cinnabar Specific Gravity

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