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Cordierite
Cordierite

Bustamite
Bustamite



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Cordierite
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Bustamite

Cordierite and Bustamite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Not Available
Partly soluble in HCl.
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.57-2.663.32-3.43
Amber
1 7.18
1.5 Fracture
Subconchoidal, Conchoidal, Brittle
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
1.6 Cleavage
Fair on {100}, poor on {001} and {010}
{100} perfect; {110} and {1 1 0} good; {010} poor
1.7 Mohs Hardness
7-7.55.5-6
Amber
2 10
1.8 Chemical Composition
Mg2Al4Si5O18
(Ca,Mn2+ )Si 3O 9Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Cordierite and Bustamite Chemical Formula

While comparing Cordierite and Bustamite 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 Bustamite chemical formula.

  • Chemical formula of Cordierite- Mg2Al4Si5O18
  • Chemical formula of Bustamite- (Ca,Mn2+ )Si 3O 9Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references

Cordierite and Bustamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Bustamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Bustamite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 3.32-3.43 whereas that of Bustamite is 3.32-3.43.