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Common Opal
Common Opal

Atacamite
Atacamite



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Common Opal
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Atacamite

Common Opal and Atacamite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Brittle
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.98-2.503.745-3.776
Amber
1 7.18
1.5 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001)
Conchoidal, Conchoidal, Brittle
1.6 Cleavage
Not Available
Perfect on {010}, fair on {101}
1.7 Mohs Hardness
5.5-6.53-3.5
Amber
2 10
1.8 Chemical Composition
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Cu2Cl(OH)3

Common Opal and Atacamite Chemical Formula

While comparing Common Opal and Atacamite 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 Common Opal and Atacamite chemical formula.

  • Chemical formula of Common Opal- SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
  • Chemical formula of Atacamite- Cu2Cl(OH)3

Common Opal and Atacamite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Common Opal and Atacamite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Common Opal and Atacamite Optical Properties during the identification of gemstone. Specific gravity of Common Opal is 3.745-3.776 whereas that of Atacamite is 3.745-3.776.