Cinnabar and Mottramite Physical Properties

Cinnabar

Mottramite

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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

25.9

1 7.18

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Fracture

Uneven

Sub-Conchoidal

Cleavage

Prismatic {10 1 0}, perfect

None observed

Mohs Hardness

2-2.53

2 10

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Chemical Composition

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

PbCu(VO4)(OH)

Cinnabar and Mottramite Chemical Formula

While comparing Cinnabar and Mottramite 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 Mottramite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Mottramite- PbCu(VO4)(OH)

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Cinnabar and Mottramite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Mottramite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 5.9 whereas that of Mottramite is 5.9.