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Creedite and Hercynite Physical Properties


Hercynite and Creedite Physical Properties


Physical Properties

Tenacity
Brittle   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
2.70   
4.39   

Fracture
Uneven, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle   
ConchoidalGemdat.org, Uneven   

Cleavage
Perfect on {100}   
{111} Indistinct, {111} Indistinct, {111} Indistinct   

Mohs Hardness
4.5   
7.5-8   

Chemical Composition
Ca 3Al 2(SO 4)(F,OH) 10Ulrich Henn and Claudio C.   
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)   

Optical Properties >>
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Creedite and Hercynite Chemical Formula

While comparing Creedite and Hercynite 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 Creedite and Hercynite chemical formula.

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Creedite and Hercynite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Creedite and Hercynite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Creedite and Hercynite Optical Properties during the identification of gemstone. Specific gravity of Creedite is 4.39 whereas that of Hercynite is 4.39.

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