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Spinel
Spinel

Brookite
Brookite



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Spinel and Brookite Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
none
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.64-3.66
3.87-4.14
1.5 Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009)
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
1.6 Cleavage
None, but may exhibit slight parting
Poor on {120}, in traces on {001}
1.7 Mohs Hardness
8
5.5-6
1.8 Chemical Composition
MgAl2O4
TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Spinel and Brookite Chemical Formula

While comparing Spinel and Brookite 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 Spinel and Brookite chemical formula.

  • Chemical formula of Spinel- MgAl2O4
  • Chemical formula of Brookite- TiO 2Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Spinel and Brookite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Spinel and Brookite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Spinel and Brookite Optical Properties during the identification of gemstone. Specific gravity of Spinel is 3.87-4.14 whereas that of Brookite is 3.87-4.14.