Willemite and Cinnabar Physical Properties

Willemite

Cinnabar

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Physical Properties

Tenacity

Slightly sectile

Solubility

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

Durability

Specific Gravity

3.89-4.182

1 7.18

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Fracture

Conchoidal, Uneven

Uneven

Cleavage

{0001}, {11 2 0} imperfect

Prismatic {10 1 0}, perfect

Mohs Hardness

5.52-2.5

2 10

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Chemical Composition

Zn 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Willemite and Cinnabar Chemical Formula

While comparing Willemite 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 Willemite and Cinnabar chemical formula.

Chemical formula of Willemite- Zn 2SiO 4Michael 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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Willemite and Cinnabar Specific Gravity

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