Cordierite and Chlorastrolite Physical Properties

Cordierite

Chlorastrolite

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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

2.57-2.663.1-3.5

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Granular

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

7-7.55-6

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)

Cordierite and Chlorastrolite Chemical Formula

While comparing Cordierite and Chlorastrolite 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 Chlorastrolite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Chlorastrolite- Ca 2(Mg,Fe)Al 2(SiO 4)(Si 2O 7)(OH) 2 · H 2O)Arthur Thomas , Gemstones (2009)

Compare Blue Gemstones

Cordierite Vs Plumbogummite

Cordierite Vs Riebeckite

Cordierite Vs Rosasite

Cordierite and Chlorastrolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Chlorastrolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Chlorastrolite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.1-3.5 whereas that of Chlorastrolite is 3.1-3.5.