Erythrite and Cinnabar Physical Properties

Erythrite

Cinnabar

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1 Physical Properties

1.1 Tenacity

Sectile

Slightly sectile

1.2 Solubility

Not Available

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

1.3 Durability

Not Available

1.4 Specific Gravity

3.062

1 7.18

1.5 Fracture

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Uneven, Uneven, Gemstones (2009), Brittle

1.6 Cleavage

Perfect on {010}; poor on {100} and { 1 02}.

Prismatic {10 1 0}, perfect

1.7 Mohs Hardness

Not Available2-2.5

2 10

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

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

Erythrite and Cinnabar Chemical Formula

While comparing Erythrite 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 Erythrite and Cinnabar chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Erythrite and Cinnabar Specific Gravity

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