Rubellite and Cobaltite Physical Properties

Rubellite

Cobaltite

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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

3.01-3.066.3

1 7.18

1.5 Fracture

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

UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, UnevenAnthony et al, Handbook of mineralogy (2001) More from other references, Brittle, Metallic

1.6 Cleavage

Not Available

{100} Good, {010} Good, {001} Good

1.7 Mohs Hardness

7-7.55.5

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.

CoAsSAnthony et al , Handbook of mineralogy (2001)

Rubellite and Cobaltite Chemical Formula

While comparing Rubellite and Cobaltite 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 Cobaltite 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 Cobaltite- CoAsSAnthony et al , Handbook of mineralogy (2001)

Compare Blue Gemstones

Rubellite Vs Shattuckite

Rubellite Vs Scorzalite

Rubellite Vs Serendibite

Rubellite and Cobaltite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rubellite and Cobaltite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Cobaltite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 6.3 whereas that of Cobaltite is 6.3.