Goethite and Cinnabar Physical Properties

Goethite

Cinnabar

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

HCl soluble

4.27-4.29

Uneven

Perfect {010}

5-5.5

FeO(OH)Arthur Thomas , Gemstones (2009)

Slightly sectile

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

Uneven

Prismatic {10 1 0}, perfect

2-2.5

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

Goethite and Cinnabar Chemical Formula

While comparing Goethite 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 Goethite and Cinnabar chemical formula.

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Goethite and Cinnabar Specific Gravity

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