Elbaite and Dravite Physical Properties

Elbaite

Dravite

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

2.90-3.103.03-3.18

1 7.18

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Fracture

Uneven, Conchoidal

Uneven, Irregular, Conchoidal

Cleavage

Poor/indistinct on {1120} and {1011}

{???} Indistinct

Mohs Hardness

77-7.5

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

Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

Elbaite and Dravite Chemical Formula

While comparing Elbaite and Dravite 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 Dravite 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 Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)

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Elbaite and Dravite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Dravite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 3.03-3.18 whereas that of Dravite is 3.03-3.18.