Spinel and Brookite Physical Properties

Spinel

Brookite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.64-3.663.87-4.14

1 7.18

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Fracture

Conchoidal, Uneven

Subconchoidal, Conchoidal

Cleavage

None, but may exhibit slight parting

Poor on {120}, in traces on {001}

Mohs Hardness

85.5-6

2 10

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Chemical Composition

MgAl₂O₄

TiO 2Michael OâDonoghue , 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 OâDonoghue , Gems, Sixth Edition (2006) More from other references

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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.