Cordierite and Spodumene Physical Properties

Cordierite

Spodumene

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

insoluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.57-2.663.15-3.21

1 7.18

1.5 Fracture

Subconchoidal, Conchoidal, Brittle

Uneven, Subconchoidal, Gemstones (2009)

1.6 Cleavage

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

Perfect prismatic, two directions {110} ∧ {1 1 0} at 87°

1.7 Mohs Hardness

7-7.56-7

2 10

1.8 Chemical Composition

Mg2Al4Si5O18

LiAlSi₂O₆

Cordierite and Spodumene Chemical Formula

While comparing Cordierite and Spodumene 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 Spodumene chemical formula.

Chemical formula of Cordierite- Mg2Al4Si5O18
Chemical formula of Spodumene- LiAlSi₂O₆

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Cordierite and Spodumene Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Spodumene Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Spodumene Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.15-3.21 whereas that of Spodumene is 3.15-3.21.