Cordierite and Eosphorite Physical Properties

Cordierite

Eosphorite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

2.57-2.663.05-3.08

1 7.18

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Fracture

Subconchoidal, Conchoidal

Subconchoidal, Uneven, Conchoidal

Cleavage

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

Poor on {100}

Mohs Hardness

7-7.55

2 10

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Chemical Composition

Mg2Al4Si5O18

Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Cordierite and Eosphorite Chemical Formula

While comparing Cordierite and Eosphorite 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 Eosphorite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Eosphorite- Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Blue Gemstones

Cordierite Vs Plumbogummite

Cordierite Vs Riebeckite

Cordierite Vs Rosasite

Cordierite and Eosphorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Eosphorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Eosphorite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.05-3.08 whereas that of Eosphorite is 3.05-3.08.