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Lazurite
Lazurite

Opal
Opal



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Lazurite
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Opal

Lazurite and Opal Physical Properties

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1 Physical Properties
1.1 Tenacity
Brittle
BrittleWalter Schumann
1.2 Solubility
Soluble
hot salt water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
2.751.98-2.25
Amber
1 7.18
1.5 Fracture
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
1.6 Cleavage
Imperfect on {110}
None
1.7 Mohs Hardness
5.55-6.5
Amber
2 10
1.8 Chemical Composition
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
SiO2 · nH2O

Lazurite and Opal Chemical Formula

While comparing Lazurite and 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 Lazurite and Opal chemical formula.

  • Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
  • Chemical formula of Opal- SiO2 · nH2O

Lazurite and Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Lazurite and Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Lazurite and Opal Optical Properties during the identification of gemstone. Specific gravity of Lazurite is 1.98-2.25 whereas that of Opal is 1.98-2.25.