Brookite and Staurolite Physical Properties

Brookite

Staurolite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.87-4.143.7-3.8

1 7.18

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Fracture

Subconchoidal, Conchoidal

Cleavage

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

Distinct on {010}

Mohs Hardness

5.5-67-7.5

2 10

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Chemical Composition

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

(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

Brookite and Staurolite Chemical Formula

While comparing Brookite and Staurolite 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 Staurolite chemical formula.

Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

Compare Red Gemstones

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Brookite and Staurolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Brookite and Staurolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Brookite and Staurolite Optical Properties during the identification of gemstone. Specific gravity of Brookite is 3.7-3.8 whereas that of Staurolite is 3.7-3.8.