Cordierite and Gahnospinel Physical Properties

Cordierite

Gahnospinel

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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

2.57-2.663.65-4.55

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

None, but may exhibit slight parting

1.7 Mohs Hardness

7-7.57.5-8

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

Cordierite and Gahnospinel Chemical Formula

While comparing Cordierite and Gahnospinel 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 Gahnospinel chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)

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Cordierite and Gahnospinel Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Gahnospinel Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Gahnospinel Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.65-4.55 whereas that of Gahnospinel is 3.65-4.55.