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Cordierite and Howlite Physical Properties


Howlite and Cordierite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.57-2.66   
2.45-2.58   

Fracture
Subconchoidal, Conchoidal, Brittle   
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal   

Cleavage
Fair on {100}, poor on {001} and {010}   
None   

Mohs Hardness
7-7.5   
3-3.5   

Chemical Composition
Mg2Al4Si5O18   
Ca 2B 5SiO 9(OH) 5Michael O’Donoghue , Gems, Sixth Edition (2006) More from other references   

Optical Properties >>
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Cordierite and Howlite Chemical Formula

While comparing Cordierite and Howlite 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 Howlite chemical formula.

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Cordierite and Howlite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Cordierite and Howlite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Cordierite and Howlite Optical Properties during the identification of gemstone. Specific gravity of Cordierite is 2.45-2.58 whereas that of Howlite is 2.45-2.58.

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