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Hercynite and Common Opal Physical Properties


Common Opal and Hercynite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
4.39   
1.98-2.50   

Fracture
ConchoidalGemdat.org, Uneven   
Conchoidal, Conchoidal, Gemstones of the world (2001)   

Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct   
Not Available   

Mohs Hardness
7.5-8   
5.5-6.5   

Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)   
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)   

Optical Properties >>
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Hercynite and Common Opal Chemical Formula

While comparing Hercynite and Common Opal 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 Hercynite and Common Opal chemical formula.

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Hercynite and Common Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hercynite and Common Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hercynite and Common Opal Optical Properties during the identification of gemstone. Specific gravity of Hercynite is 1.98-2.50 whereas that of Common Opal is 1.98-2.50.

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