Bustamite and Brookite Physical Properties

Bustamite

Brookite

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Physical Properties

Tenacity

Brittle

Solubility

Partly soluble in HCl.

Durability

Specific Gravity

3.32-3.433.87-4.14

1 7.18

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Fracture

Conchoidal

Subconchoidal, Conchoidal

Cleavage

{100} perfect; {110} and {1 1 0} good; {010} poor

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

Mohs Hardness

5.5-65.5-6

2 10

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Chemical Composition

(Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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

Bustamite and Brookite Chemical Formula

While comparing Bustamite 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 Bustamite and Brookite chemical formula.

Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Brookite- TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Bustamite and Brookite Specific Gravity

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