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Brookite
Brookite

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Cinnabar



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Brookite and Cinnabar Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
Slightly sectile
1.2 Solubility
Not Available
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.87-4.14
2
1.5 Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Uneven, Uneven, Gemstones (2009), Brittle
1.6 Cleavage
Poor on {120}, in traces on {001}
Prismatic {10 1 0}, perfect
1.7 Mohs Hardness
5.5-6
2-2.5
1.8 Chemical Composition
TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
HgSMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Brookite and Cinnabar Chemical Formula

While comparing Brookite 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 Brookite and Cinnabar chemical formula.

  • Chemical formula of Brookite- TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references
  • Chemical formula of Cinnabar- HgSMichael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Brookite and Cinnabar Specific Gravity

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