Elbaite and Bytownite Physical Properties

Elbaite

Bytownite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.90-3.102.72-2.75

1 7.18

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Fracture

Uneven, Conchoidal

Uneven

Cleavage

Poor/indistinct on {1120} and {1011}

Perfect on [001], good on [010], imperfect on [110]

Mohs Hardness

76-6.5

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(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Elbaite and Bytownite Chemical Formula

While comparing Elbaite and Bytownite 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 Bytownite 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 Bytownite- Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Elbaite and Bytownite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Bytownite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Bytownite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 2.72-2.75 whereas that of Bytownite is 2.72-2.75.