Natrolite and Iolite Physical Properties

Natrolite

Iolite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.20-2.262.6-2.7

1 7.18

1.5 Fracture

Uneven, Brittle, Metallic, Gemstones (2009)

Not Available

1.6 Cleavage

Perfect on {110}

3,1

1.7 Mohs Hardness

5-5.57-7.5

2 10

1.8 Chemical Composition

Na 2[Al 2Si 3O 10] · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Mg₂Al₄Si₅O₁₈

Natrolite and Iolite Chemical Formula

While comparing Natrolite 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 Natrolite and Iolite chemical formula.

Chemical formula of Natrolite- Na 2[Al 2Si 3O 10] · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Natrolite and Iolite Specific Gravity

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