Cordierite and Labradorite Physical Properties

Cordierite

Labradorite

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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

2.57-2.66

2.69-2.72

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven, Conchoidal, Gems, Sixth Edition (2006)

1.6 Cleavage

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

Perfect on {001}, less perfect on {010}, intersecting at near 90°; distinct on {110}

1.7 Mohs Hardness

7-7.5

6-6.5

1.8 Chemical Composition

Mg2Al4Si5O18

(Na,Ca)_1-2Si_3-2O₈

Cordierite and Labradorite Chemical Formula

While comparing Cordierite and Labradorite 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 Labradorite chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Labradorite- (Na,Ca)_1-2Si_3-2O₈

Compare Blue Gemstones

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Cordierite and Labradorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Labradorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Labradorite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.69-2.72 whereas that of Labradorite is 2.69-2.72.