Rubellite and Ruby Physical Properties

Rubellite

Ruby

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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

3.01-3.063.97-4.05

1 7.18

1.5 Fracture

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

Conchoidal

1.6 Cleavage

Not Available

No true cleavage

1.7 Mohs Hardness

7-7.59

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.

Al ₂ O ₃

Rubellite and Ruby Chemical Formula

While comparing Rubellite and Ruby 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 Ruby 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 Ruby- Al ₂ O ₃

Compare Blue Gemstones

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Rubellite Vs Scorzalite

Rubellite Vs Shattuckite

Rubellite and Ruby Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rubellite and Ruby Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Ruby Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 3.97-4.05 whereas that of Ruby is 3.97-4.05.