Cordierite and Cinnabar Physical Properties

Cordierite

Cinnabar

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Physical Properties

Tenacity

Brittle

Slightly sectile

Solubility

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

Durability

Specific Gravity

2.57-2.662

1 7.18

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Fracture

Subconchoidal, Conchoidal

Uneven

Cleavage

Fair on {100}, poor on {001} and {010}

Prismatic {10 1 0}, perfect

Mohs Hardness

7-7.52-2.5

2 10

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Chemical Composition

Mg2Al4Si5O18

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

Cordierite and Cinnabar Chemical Formula

While comparing Cordierite 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 Cordierite and Cinnabar chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Cordierite Vs Plumbogummite

Cordierite Vs Riebeckite

Cordierite Vs Rosasite

Cordierite and Cinnabar Specific Gravity

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