Iolite and Dumortierite Physical Properties

Iolite

Dumortierite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.6-2.7

3.26-3.41

1.5 Fracture

Not Available

Fibrous, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

3,1

Distinct on {100}, poor on {110}; parting on {001}

1.7 Mohs Hardness

7-7.5

7-8.5

1.8 Chemical Composition

Mg₂Al₄Si₅O₁₈

AlAl₆O₃BSi₃O₁₈

Iolite and Dumortierite Chemical Formula

While comparing Iolite and Dumortierite 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 Dumortierite chemical formula.

Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈
Chemical formula of Dumortierite- AlAl₆O₃BSi₃O₁₈

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Iolite and Dumortierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Iolite and Dumortierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Iolite and Dumortierite Optical Properties during the identification of gemstone. Specific gravity of Iolite is 3.26-3.41 whereas that of Dumortierite is 3.26-3.41.