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Fire Opal
Fire Opal

Cinnabar
Cinnabar



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Fire Opal
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Cinnabar

Fire Opal and Cinnabar Physical Properties

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

1.97-2.222
1 7.18
👆🏻

Fracture

Conchoidal
Uneven

Cleavage

None
Prismatic {10 1 0}, perfect

Mohs Hardness

6-6.52-2.5
2 10
👆🏻

Chemical Composition

SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
HgSMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Fire Opal and Cinnabar Chemical Formula

While comparing Fire Opal 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 Fire Opal and Cinnabar chemical formula.

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

Fire Opal and Cinnabar Specific Gravity

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