Rubellite and Hercynite Physical Properties

Rubellite

Hercynite

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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

3.01-3.064.39

1 7.18

1.5 Fracture

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

ConchoidalGemdat.org, Uneven

1.6 Cleavage

Not Available

{111} Indistinct, {111} Indistinct, {111} Indistinct

1.7 Mohs Hardness

7-7.57.5-8

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.

Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

Rubellite and Hercynite Chemical Formula

While comparing Rubellite and Hercynite 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 Hercynite 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 Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)

Compare Blue Gemstones

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Rubellite and Hercynite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Rubellite and Hercynite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Rubellite and Hercynite Optical Properties during the identification of gemstone. Specific gravity of Rubellite is 4.39 whereas that of Hercynite is 4.39.