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Opal
Opal

Vivianite
Vivianite



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Opal
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Vivianite

Opal and Vivianite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
BrittleWalter Schumann
hot salt water
-
1.98-2.25
Conchoidal
None
5-6.5
SiO2 · nH2O
 
-
-
-
2.64-2.70
-
{010} Perfect
-9999
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Opal and Vivianite Chemical Formula

While comparing Opal and Vivianite 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 Opal and Vivianite chemical formula.

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Opal and Vivianite Specific Gravity

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