Brookite and Hibonite Physical Properties

Brookite

Hibonite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.87-4.143.84

1 7.18

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Fracture

Subconchoidal, Conchoidal

Cleavage

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

{0001} good, {10 1 0} parting

Mohs Hardness

5.5-67.5-8

2 10

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Chemical Composition

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

(Ca,Ce)(Al,Ti,Mg)12O19

Brookite and Hibonite Chemical Formula

While comparing Brookite and Hibonite 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 Hibonite chemical formula.

Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Hibonite- (Ca,Ce)(Al,Ti,Mg)12O19

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Brookite and Hibonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brookite and Hibonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brookite and Hibonite Optical Properties during the identification of gemstone. Specific gravity of Brookite is 3.84 whereas that of Hibonite is 3.84.