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Cordierite
Cordierite

Hollandite
Hollandite



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Cordierite
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Hollandite

Cordierite and Hollandite Physical Properties

1 Physical Properties
1.1 Tenacity
Brittle
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.57-2.66
5.05
1.5 Fracture
Subconchoidal, Conchoidal, Brittle
Brittle, Metallic
1.6 Cleavage
Fair on {100}, poor on {001} and {010}
Distinct / Good, Prismatic
1.7 Mohs Hardness
7-7.5
4-6
1.8 Chemical Composition
Mg2Al4Si5O18
Ba(Mn++++,Mn++)8O16

Cordierite and Hollandite Chemical Formula

While comparing Cordierite and Hollandite 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 Hollandite chemical formula.

  • Chemical formula of Cordierite- Mg2Al4Si5O18
  • Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16

Cordierite and Hollandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Hollandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Hollandite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 5.05 whereas that of Hollandite is 5.05.