Staurolite and Bustamite Physical Properties

Staurolite

Bustamite

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Physical Properties

Tenacity

Brittle

Solubility

Partly soluble in HCl.

Durability

Specific Gravity

3.7-3.83.32-3.43

1 7.18

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Fracture

Subconchoidal, Conchoidal

Conchoidal

Cleavage

Distinct on {010}

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

Mohs Hardness

7-7.55.5-6

2 10

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Chemical Composition

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

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

Staurolite and Bustamite Chemical Formula

While comparing Staurolite and Bustamite 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 Staurolite and Bustamite chemical formula.

Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Staurolite and Bustamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Staurolite and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Staurolite and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Staurolite is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.