Rubellite and Covellite Physical Properties

Rubellite

Covellite

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1 Physical Properties

1.1 Tenacity

Not Available

Flexible

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.01-3.064.6-4.76

1 7.18

1.5 Fracture

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

Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic

1.6 Cleavage

Not Available

Perfect on {0001}

1.7 Mohs Hardness

7-7.5Not Available

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.

CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Rubellite and Covellite Chemical Formula

While comparing Rubellite and Covellite 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 Covellite 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 Covellite- CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references

Compare Blue Gemstones

Rubellite Vs Serendibite

Rubellite Vs Shattuckite

Rubellite Vs Scorzalite

Rubellite and Covellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rubellite and Covellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Covellite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 4.6-4.76 whereas that of Covellite is 4.6-4.76.