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Black Opal
Black Opal

Vivianite
Vivianite



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Black Opal
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Vivianite

Black Opal and Vivianite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.97-2.222.64-2.70
Amber
1 7.18
1.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
(e.g. graphite).
1.6 Cleavage
Not Available
{010} Perfect
1.7 Mohs Hardness
6-6.5Not Available
Amber
2 10
1.8 Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Black Opal and Vivianite Chemical Formula

While comparing Black 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 Black Opal and Vivianite chemical formula.

  • Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.
  • Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Black Opal and Vivianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Black Opal and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Black Opal and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Black Opal is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.