Elbaite and Gahnite Physical Properties

Elbaite

Gahnite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.90-3.10

4.00-4.62

1.5 Fracture

Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Conchoidal, Uneven

1.6 Cleavage

Poor/indistinct on {1120} and {1011}

Indistinct parting on [111]

1.7 Mohs Hardness

7.5-8

1.8 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

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Elbaite and Gahnite Chemical Formula

While comparing Elbaite and Gahnite 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 Gahnite 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 Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Elbaite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.