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Cordierite
Cordierite

Staurolite
Staurolite



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Cordierite
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Staurolite

Cordierite and Staurolite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.57-2.663.7-3.8
Amber
1 7.18
1.5 Fracture
Subconchoidal, Conchoidal, Brittle
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
1.6 Cleavage
Fair on {100}, poor on {001} and {010}
Distinct on {010}
1.7 Mohs Hardness
7-7.57-7.5
Amber
2 10
1.8 Chemical Composition
Mg2Al4Si5O18
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

Cordierite and Staurolite Chemical Formula

While comparing Cordierite and Staurolite 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 Staurolite chemical formula.

  • Chemical formula of Cordierite- Mg2Al4Si5O18
  • Chemical formula of Staurolite- (Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.

Cordierite and Staurolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Staurolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Staurolite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.7-3.8 whereas that of Staurolite is 3.7-3.8.