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Pargasite
Pargasite

Iolite
Iolite



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Pargasite
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Iolite

Pargasite and Iolite Physical Properties

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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
3.04-3.262.6-2.7
Amber
1 7.18
1.5 Fracture
Splintery, Brittle, Uneven
Not Available
1.6 Cleavage
{110} perfect
3,1
1.7 Mohs Hardness
5-67-7.5
Amber
2 10
1.8 Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)
Mg2Al4Si5O18

Pargasite and Iolite Chemical Formula

While comparing Pargasite 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 Pargasite and Iolite chemical formula.

  • Chemical formula of Pargasite- NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Iolite- Mg2Al4Si5O18

Pargasite and Iolite Specific Gravity

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