Apophyllite and Cinnabar Physical Properties

Apophyllite

Cinnabar

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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)

Durability

Specific Gravity

2.30-2.502

1 7.18

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Fracture

Uneven

Cleavage

Perfect on (001)

Prismatic {10 1 0}, perfect

Mohs Hardness

4.5-52-2.5

2 10

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Chemical Composition

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.

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

Apophyllite and Cinnabar Chemical Formula

While comparing Apophyllite 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 Apophyllite and Cinnabar chemical formula.

Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Apophyllite and Cinnabar Specific Gravity

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