Cordierite and Poldervaartite Physical Properties

Cordierite

Poldervaartite

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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

2.57-2.662.91

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Handbook of mineralogy (2001)

1.6 Cleavage

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

None

1.7 Mohs Hardness

7-7.5Not Available

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

(Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

Cordierite and Poldervaartite Chemical Formula

While comparing Cordierite and Poldervaartite 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 Poldervaartite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Poldervaartite- (Ca,Mn2+ ) 2(SiO 3OH)(OH)Anthony et al , Handbook of Mineralogy (2001)

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Cordierite and Poldervaartite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Poldervaartite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Poldervaartite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.91 whereas that of Poldervaartite is 2.91.