Elbaite and Bustamite Physical Properties

Elbaite

Bustamite

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Physical Properties

Tenacity

Solubility

Partly soluble in HCl.

Durability

Specific Gravity

2.90-3.103.32-3.43

1 7.18

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Fracture

Uneven, Conchoidal

Conchoidal

Cleavage

Poor/indistinct on {1120} and {1011}

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

Mohs Hardness

75.5-6

2 10

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Chemical Composition

Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references

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

Elbaite and Bustamite Chemical Formula

While comparing Elbaite 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 Elbaite and Bustamite chemical formula.

Chemical formula of Elbaite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Elbaite and Bustamite Specific Gravity

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