Opal and Azurite Physical Properties
Tenacity
BrittleWalter Schumann
Brittle
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
3.70-3.90
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
None
Perfect on {011}, fair on {100}, poor on {110}
Mohs Hardness
5-6.5
3.5-4
Chemical Composition
SiO2 · nH2O
Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Azurite Chemical Formula
While comparing Opal and Azurite 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 Azurite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Azurite- Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Opal and Azurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Azurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Azurite Optical Properties during the identification of gemstone. Specific gravity of Opal is 3.70-3.90 whereas that of Azurite is 3.70-3.90.