Aragonite and Cinnabar Physical Properties

Aragonite

Cinnabar

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Physical Properties

Tenacity

Brittle

Slightly sectile

Solubility

Dilute acid

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

Durability

Specific Gravity

2.93-2.962

1 7.18

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Fracture

Subconchoidal, Conchoidal

Uneven

Cleavage

Distinct on {010}, imperfect {110} and {011}

Prismatic {10 1 0}, perfect

Mohs Hardness

3.5-42-2.5

2 10

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Chemical Composition

CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Aragonite and Cinnabar Chemical Formula

While comparing Aragonite 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 Aragonite and Cinnabar chemical formula.

Chemical formula of Aragonite- CaCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Aragonite and Cinnabar Specific Gravity

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