Fayalite and Cinnabar Physical Properties

Fayalite

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

4.3922

1 7.18

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Fracture

Conchoidal

Uneven

Cleavage

{010} moderate, {100} imperfect

Prismatic {10 1 0}, perfect

Mohs Hardness

6.5-72-2.5

2 10

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Chemical Composition

Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Fayalite and Cinnabar Chemical Formula

While comparing Fayalite 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 Fayalite and Cinnabar chemical formula.

Chemical formula of Fayalite- Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Fayalite and Cinnabar Specific Gravity

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