Cinnabar and Annabergite Physical Properties

Cinnabar

Annabergite

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Physical Properties

Tenacity

Slightly sectile

Sectile

Solubility

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

Durability

Specific Gravity

23.07

1 7.18

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Fracture

Uneven

Cleavage

Prismatic {10 1 0}, perfect

Perfect on {010}, indistinct on {100} and {102}

Mohs Hardness

2-2.52

2 10

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Chemical Composition

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

Ni3(AsO4)2•8(H2O)

Cinnabar and Annabergite Chemical Formula

While comparing Cinnabar and Annabergite 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 Annabergite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)

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Cinnabar and Annabergite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Annabergite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Annabergite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 3.07 whereas that of Annabergite is 3.07.