Cordierite and Pectolite Physical Properties

Cordierite

Pectolite

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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

2.57-2.662.74-2.90

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven, Gemstones (2009), Splintery

1.6 Cleavage

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

Perfect on {100} and {001}

1.7 Mohs Hardness

7-7.54.5-5

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

Cordierite and Pectolite Chemical Formula

While comparing Cordierite and Pectolite 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 Pectolite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Pectolite- Ca 2NaHSi 3O 9Ulrich Henn and Claudio C.

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Cordierite and Pectolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Pectolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Pectolite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.74-2.90 whereas that of Pectolite is 2.74-2.90.