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Iolite
Iolite

Forsterite
Forsterite



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Iolite
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Forsterite

Iolite and Forsterite Physical Properties

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Physical Properties

Tenacity

Solubility

Durability

Specific Gravity

Fracture

Cleavage

Mohs Hardness

Chemical Composition

 
-
-
-
2.6-2.7
-
3,1
7-7.5
Mg2Al4Si5O18
 
-
-
-
3.23-3.26
Conchoidal
Perfect on {010} imperfect on {100}
6.5-7
Mg 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Iolite and Forsterite Chemical Formula

While comparing Iolite and Forsterite 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 Iolite and Forsterite chemical formula.

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Iolite and Forsterite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Forsterite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite Vs Forsterite during the identification of gemstone. Specific gravity of Iolite is whereas that of Forsterite is .