Hercynite and Cordierite Physical Properties

Hercynite

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

4.392.57-2.66

1 7.18

1.5 Fracture

ConchoidalGemdat.org, Uneven

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

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

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

1.7 Mohs Hardness

7.5-87-7.5

2 10

1.8 Chemical Composition

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

Mg2Al4Si5O18

Hercynite and Cordierite Chemical Formula

While comparing Hercynite 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 Hercynite and Cordierite chemical formula.

Chemical formula of Hercynite- Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Chemical formula of Cordierite- Mg2Al4Si5O18

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Hercynite and Cordierite Specific Gravity

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