Pyrope and Cinnabar Physical Properties

Pyrope

Cinnabar

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Physical Properties

Tenacity

Slightly sectile

Solubility

insoluble in water

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

Durability

Specific Gravity

3.62-3.872

1 7.18

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Fracture

Conchoidal

Uneven

Cleavage

None

Prismatic {10 1 0}, perfect

Mohs Hardness

7-7.52-2.5

2 10

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Chemical Composition

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

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

Pyrope and Cinnabar Chemical Formula

While comparing Pyrope and Cinnabar 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 Pyrope and Cinnabar chemical formula.

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

Compare Red Gemstones

Pyrope Vs Rhodolite

Pyrope Vs Rutile

Pyrope Vs Sarcopside

Pyrope and Cinnabar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Pyrope and Cinnabar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Pyrope and Cinnabar Optical Properties during the identification of gemstone. Specific gravity of Pyrope is 2 whereas that of Cinnabar is 2.