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Precious Opal
Precious Opal

Iolite
Iolite



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Precious Opal
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Iolite

Precious Opal and Iolite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.98-2.252.6-2.7
Amber
1 7.18
1.5 Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
Not Available
1.6 Cleavage
Not Available
3,1
1.7 Mohs Hardness
5-6.57-7.5
Amber
2 10
1.8 Chemical Composition
SiO 2 · nH 2OGemdat.org , Management Team (2012)
Mg2Al4Si5O18

Precious Opal and Iolite Chemical Formula

While comparing Precious Opal and Iolite 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 Iolite chemical formula.

  • Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
  • Chemical formula of Iolite- Mg2Al4Si5O18

Precious Opal and Iolite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Precious Opal and Iolite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Precious Opal and Iolite Optical Properties during the identification of gemstone. Specific gravity of Precious Opal is 2.6-2.7 whereas that of Iolite is 2.6-2.7.