Cinnabar and Ettringite Physical Properties

Cinnabar

Ettringite

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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)

Partially soluble in water

Durability

Specific Gravity

21.77

1 7.18

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Fracture

Uneven

Cleavage

Prismatic {10 1 0}, perfect

Perfect on {10 1 0}

Mohs Hardness

2-2.52-2.5

2 10

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Chemical Composition

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

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Cinnabar and Ettringite Chemical Formula

While comparing Cinnabar and Ettringite 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 Ettringite chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Red Gemstones

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Cinnabar and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 1.77 whereas that of Ettringite is 1.77.