Precious Opal and Pezzottaite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.90-3.14
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Cleavage
Not Available
Imperfect; basal
Mohs Hardness
5-6.5
7.5-8
Chemical Composition
SiO 2 · nH 2OGemdat.org , Management Team (2012)
(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.
Precious Opal and Pezzottaite Chemical Formula
While comparing Precious Opal and Pezzottaite 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 Pezzottaite chemical formula.
- Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
- Chemical formula of Pezzottaite- (Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.
Precious Opal and Pezzottaite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Precious Opal and Pezzottaite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Pezzottaite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.90-3.14 whereas that of Pezzottaite is 2.90-3.14.