Cinnabar and Pyrope Physical Properties

Cinnabar

Pyrope

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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)

insoluble in water

Durability

Specific Gravity

23.62-3.87

1 7.18

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Fracture

Uneven

Conchoidal

Cleavage

Prismatic {10 1 0}, perfect

None

Mohs Hardness

2-2.57-7.5

2 10

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Chemical Composition

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

Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Cinnabar and Pyrope Chemical Formula

While comparing Cinnabar and Pyrope 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 Pyrope chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Pyrope- Mg 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)

Compare Red Gemstones

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Cinnabar Vs Hexagonite

Cinnabar and Pyrope Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Pyrope Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Pyrope Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 3.62-3.87 whereas that of Pyrope is 3.62-3.87.