Cinnabar and Pyromorphite Physical Properties

Cinnabar

Pyromorphite

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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)

Durability

Specific Gravity

26.5-7.1

1 7.18

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Fracture

Uneven

Uneven, Conchoidal

Cleavage

Prismatic {10 1 0}, perfect

Imperfect- [10 1 1]

Mohs Hardness

2-2.53.5-4

2 10

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Chemical Composition

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

Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

Cinnabar and Pyromorphite Chemical Formula

While comparing Cinnabar and Pyromorphite 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 Pyromorphite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

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Cinnabar and Pyromorphite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Pyromorphite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Pyromorphite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 6.5-7.1 whereas that of Pyromorphite is 6.5-7.1.