Cinnabar and Sylvite Physical Properties

Cinnabar

Sylvite

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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)

Soluble

Durability

Specific Gravity

21.993

1 7.18

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Fracture

Uneven

Cleavage

Prismatic {10 1 0}, perfect

Perfect on [100], [010], [001]

Mohs Hardness

2-2.52.5

2 10

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Chemical Composition

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

KCl

Cinnabar and Sylvite Chemical Formula

While comparing Cinnabar and Sylvite 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 Sylvite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Sylvite- KCl

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Cinnabar and Sylvite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Sylvite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Sylvite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 1.993 whereas that of Sylvite is 1.993.