Opal and Lazurite Physical Properties
Tenacity
BrittleWalter Schumann
Brittle
Solubility
hot salt water
Soluble
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
2.75
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
None
Imperfect on {110}
Chemical Composition
SiO2 · nH2O
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Opal and Lazurite Chemical Formula
While comparing Opal and Lazurite 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 Lazurite chemical formula.
- Chemical formula of Opal- SiO2 · nH2O
- Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Opal and Lazurite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Opal and Lazurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Opal and Lazurite Optical Properties during the identification of gemstone. Specific gravity of Opal is 2.75 whereas that of Lazurite is 2.75.