Rubellite and Pargasite Physical Properties

Rubellite

Pargasite

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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

3.01-3.063.04-3.26

1 7.18

1.5 Fracture

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

Splintery, Brittle, Uneven

1.6 Cleavage

Not Available

{110} perfect

1.7 Mohs Hardness

7-7.55-6

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.

NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Rubellite and Pargasite Chemical Formula

While comparing Rubellite and Pargasite 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 Pargasite 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 Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Rubellite Vs Shattuckite

Rubellite Vs Serendibite

Rubellite Vs Scorzalite

Rubellite and Pargasite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rubellite and Pargasite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Pargasite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 3.04-3.26 whereas that of Pargasite is 3.04-3.26.