Shigaite and Rubellite Physical Properties

Shigaite

Rubellite

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1 Physical Properties

1.1 Tenacity

Moderately ﬂexible

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.323.01-3.06

1 7.18

1.5 Fracture

Flexible Flexible fragments.

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

1.6 Cleavage

Perfect on {0001}

Not Available

1.7 Mohs Hardness

27-7.5

2 10

1.8 Chemical Composition

Not Available

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.

Shigaite and Rubellite Chemical Formula

While comparing Shigaite and Rubellite 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 Shigaite and Rubellite 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.

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Shigaite and Rubellite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Shigaite and Rubellite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Shigaite and Rubellite Optical Properties during the identification of gemstone. Specific gravity of Shigaite is 3.01-3.06 whereas that of Rubellite is 3.01-3.06.