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Vivianite and Opal Physical Properties


Opal and Vivianite Physical Properties


Physical Properties

Tenacity
Not Available   
BrittleWalter Schumann   

Solubility
Not Available   
hot salt water   

Durability
Not Available   
Not Available   

Specific Gravity
2.64-2.70   
1.98-2.25   

Fracture
(e.g. graphite).   
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle   

Cleavage
{010} Perfect   
None   

Mohs Hardness
Not Available   
5-6.5   

Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.   
SiO2 · nH2O   

Optical Properties >>
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Vivianite and Opal Chemical Formula

While comparing Vivianite and 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 Vivianite and Opal chemical formula.

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Vivianite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Vivianite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Vivianite and Opal Optical Properties during the identification of gemstone. Specific gravity of Vivianite is 1.98-2.25 whereas that of Opal is 1.98-2.25.

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