Cordierite and Brookite Physical Properties

Cordierite

Brookite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.663.87-4.14

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle

1.6 Cleavage

Fair on {100}, poor on {001} and {010}

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

1.7 Mohs Hardness

7-7.55.5-6

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

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

Cordierite and Brookite Chemical Formula

While comparing Cordierite 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 Cordierite and Brookite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Cordierite and Brookite Specific Gravity

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