Cordierite and Kornerupine Physical Properties

Cordierite

Kornerupine

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.663.25-3.45

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Uneven

1.6 Cleavage

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

Good on {110}

1.7 Mohs Hardness

7-7.56.5

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references

Cordierite and Kornerupine Chemical Formula

While comparing Cordierite and Kornerupine 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 Cordierite and Kornerupine chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Kornerupine- Mg 3Al 6(Si,Al,B) 5O 21(OH)Walter Schumann , Gemstones of the world (2001) More from other references

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Cordierite and Kornerupine Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Kornerupine Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Kornerupine Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.25-3.45 whereas that of Kornerupine is 3.25-3.45.