Precious Opal and Vivianite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.64-2.70
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
(e.g. graphite).
Cleavage
Not Available
{010} Perfect
Mohs Hardness
5-6.5
Not Available
Chemical Composition
SiO 2 · nH 2OGemdat.org , Management Team (2012)
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Precious Opal and Vivianite Chemical Formula
While comparing Precious 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 Precious Opal and Vivianite chemical formula.
- Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
- Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Precious Opal and Vivianite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Precious Opal and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.