Cinnabar and Fire Opal Physical Properties

Cinnabar

Fire Opal

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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

21.97-2.22

1 7.18

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Fracture

Uneven

Conchoidal

Cleavage

Prismatic {10 1 0}, perfect

None

Mohs Hardness

2-2.56-6.5

2 10

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Chemical Composition

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

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references

Cinnabar and Fire Opal Chemical Formula

While comparing Cinnabar and Fire Opal 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 Cinnabar and Fire Opal chemical formula.

Chemical formula of Cinnabar- HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Fire Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references

Compare Red Gemstones

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Cinnabar Vs Hexagonite

Cinnabar and Fire Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cinnabar and Fire Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cinnabar and Fire Opal Optical Properties during the identification of gemstone. Specific gravity of Cinnabar is 1.97-2.22 whereas that of Fire Opal is 1.97-2.22.