Elbaite and Cordierite Physical Properties

Elbaite

Cordierite

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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

2.90-3.102.57-2.66

1 7.18

1.5 Fracture

Uneven, Conchoidal, Brittle, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

Poor/indistinct on {1120} and {1011}

Fair on {100}, poor on {001} and {010}

1.7 Mohs Hardness

77-7.5

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) More from other references

Mg2Al4Si5O18

Elbaite and Cordierite Chemical Formula

While comparing Elbaite and Cordierite 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 Elbaite and Cordierite chemical formula.

Chemical formula of Elbaite- Na(Li 1.5Al 1.5)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012) More from other references
Chemical formula of Cordierite- Mg2Al4Si5O18

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Elbaite and Cordierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Elbaite and Cordierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Elbaite and Cordierite Optical Properties during the identification of gemstone. Specific gravity of Elbaite is 2.57-2.66 whereas that of Cordierite is 2.57-2.66.