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Vivianite
Vivianite

Opal
Opal



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Vivianite
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Opal

Vivianite and Opal Physical Properties

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1 Physical Properties
1.1 Tenacity
Not Available
BrittleWalter Schumann
1.2 Solubility
Not Available
hot salt water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.64-2.701.98-2.25
Amber
1 7.18
1.5 Fracture
(e.g. graphite).
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
1.6 Cleavage
{010} Perfect
None
1.7 Mohs Hardness
Not Available5-6.5
Amber
2 10
1.8 Chemical Composition
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
SiO2 · nH2O

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.

  • Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
  • Chemical formula of Opal- SiO2 · nH2O

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.