Opal and Fire Opal Physical Properties
Tenacity
BrittleWalter Schumann
Not Available
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
1.97-2.22
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
None
Not Available
Mohs Hardness
5-6.5
6-6.5
Chemical Composition
SiO2 · nH2O
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
Opal and Fire Opal Chemical Formula
While comparing Opal and Fire 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 Opal and Fire Opal chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Fire Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001) More from other references
Opal and Fire Opal Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Fire Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Fire Opal Optical Properties during the identification of gemstone. Specific gravity of Opal is 1.97-2.22 whereas that of Fire Opal is 1.97-2.22.