Iddingsite and Cordierite Physical Properties

Iddingsite

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

2.5-2.82.57-2.66

1 7.18

1.5 Fracture

Not Available

Subconchoidal, Conchoidal, Brittle

1.6 Cleavage

{???} Perfect

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

1.7 Mohs Hardness

37-7.5

2 10

1.8 Chemical Composition

MgO.Fe2O3.3SiO2•4(H2O)

Mg2Al4Si5O18

Iddingsite and Cordierite Chemical Formula

While comparing Iddingsite 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 Iddingsite and Cordierite chemical formula.

Chemical formula of Iddingsite- MgO.Fe2O3.3SiO2•4(H2O)
Chemical formula of Cordierite- Mg2Al4Si5O18

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Iddingsite and Cordierite Specific Gravity

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