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Precious Opal
Precious Opal

Plasma
Plasma



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Precious Opal
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Plasma

Precious Opal and Plasma Physical Properties

Physical Properties

Tenacity

-
-

Solubility

-
-

Durability

-
-

Specific Gravity

1.98-2.25-9999
1 7.18
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Fracture

Conchoidal
-

Cleavage

None
None

Mohs Hardness

5-6.5-9999
2 10
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Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)
Cu9(AsO4)2(OH)10

Precious Opal and Plasma Chemical Formula

While comparing Precious Opal and Plasma 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 Plasma chemical formula.

  • Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
  • Chemical formula of Plasma- Cu9(AsO4)2(OH)10

Precious Opal and Plasma Specific Gravity

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