Rubellite and Bytownite Physical Properties

Rubellite

Bytownite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.01-3.062.72-2.75

1 7.18

1.5 Fracture

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

Uneven, Uneven, Gems, Sixth Edition (2006)

1.6 Cleavage

Not Available

Perfect on [001], good on [010], imperfect on [110]

1.7 Mohs Hardness

7-7.56-6.5

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.

Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Rubellite and Bytownite Chemical Formula

While comparing Rubellite and Bytownite 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 Bytownite 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 Bytownite- Ca(70-90%)Na(30-10%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Rubellite Vs Scorzalite

Rubellite Vs Serendibite

Rubellite Vs Shattuckite

Rubellite and Bytownite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rubellite and Bytownite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Bytownite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 2.72-2.75 whereas that of Bytownite is 2.72-2.75.