Elbaite and Lepidolite Physical Properties

Elbaite

Lepidolite

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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

2.90-3.102.80-2.90

1 7.18

1.5 Fracture

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

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Poor/indistinct on {1120} and {1011}

{001} perfect

1.7 Mohs Hardness

72.5

2 10

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

Mg 3Si 4O 10(OH) 2Ulrich Henn and Claudio C.

Elbaite and Lepidolite Chemical Formula

While comparing Elbaite and Lepidolite 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 Lepidolite 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 Lepidolite- Mg 3Si 4O 10(OH) 2Ulrich Henn and Claudio C.

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Elbaite and Lepidolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Lepidolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Lepidolite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 2.80-2.90 whereas that of Lepidolite is 2.80-2.90.