Rubellite and Lepidolite Physical Properties

Rubellite

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

3.01-3.062.80-2.90

1 7.18

1.5 Fracture

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

Uneven, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Not Available

{001} perfect

1.7 Mohs Hardness

7-7.52.5

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) Formula given for elbaite.

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

Rubellite and Lepidolite Chemical Formula

While comparing Rubellite 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 Rubellite and Lepidolite chemical formula.

Chemical formula of Rubellite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) Formula given for elbaite.
Chemical formula of Lepidolite- Mg 3Si 4O 10(OH) 2Ulrich Henn and Claudio C.

Compare Blue Gemstones

Rubellite Vs Shattuckite

Rubellite Vs Serendibite

Rubellite Vs Scorzalite

Rubellite and Lepidolite Specific Gravity

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