Cordierite and Zincite Physical Properties

Cordierite

Zincite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.665.50-5.90

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle

1.6 Cleavage

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

On {10 1 0}, perfect; parting on {000 1 }

1.7 Mohs Hardness

7-7.54

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

(Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)

Cordierite and Zincite Chemical Formula

While comparing Cordierite and Zincite 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 Zincite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Zincite- (Zn,Mn2+ )OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Cordierite and Zincite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Zincite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Zincite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 5.50-5.90 whereas that of Zincite is 5.50-5.90.