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Cordierite
Cordierite

Spodumene
Spodumene



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Cordierite
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Spodumene

Cordierite and Spodumene Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Not Available
insoluble
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.57-2.66
3.15-3.21
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
7-7.5
6-7
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

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.