Neptunite and Elbaite Physical Properties

Neptunite

Elbaite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.19-3.232.90-3.10

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

{110} good

Poor/indistinct on {1120} and {1011}

1.7 Mohs Hardness

5-67

2 10

1.8 Chemical Composition

KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)

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

Neptunite and Elbaite Chemical Formula

While comparing Neptunite and Elbaite 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 Neptunite and Elbaite chemical formula.

Chemical formula of Neptunite- KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
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

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Neptunite and Elbaite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Neptunite and Elbaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Neptunite and Elbaite Optical Properties during the identification of gemstone. Specific gravity of Neptunite is 2.90-3.10 whereas that of Elbaite is 2.90-3.10.