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Thulite
Thulite

Iolite
Iolite



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Thulite
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Iolite

Thulite 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
3.12.6-2.7
Amber
1 7.18
1.5 Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)
Not Available
1.6 Cleavage
Perfect {010} imperfect {100}
3,1
1.7 Mohs Hardness
6-77-7.5
Amber
2 10
1.8 Chemical Composition
Ca2Al3(SiO4)3(OH)
Mg2Al4Si5O18

Thulite and Iolite Chemical Formula

While comparing Thulite 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 Thulite and Iolite chemical formula.

  • Chemical formula of Thulite- Ca2Al3(SiO4)3(OH)
  • Chemical formula of Iolite- Mg2Al4Si5O18

Thulite and Iolite Specific Gravity

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