Legrandite and Iolite Physical Properties

Legrandite

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

3.98-4.042.6-2.7

1 7.18

1.5 Fracture

Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle

Not Available

1.6 Cleavage

Imperfect, poor one {100}

3,1

1.7 Mohs Hardness

4.5-57-7.5

2 10

1.8 Chemical Composition

Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Mg₂Al₄Si₅O₁₈

Legrandite and Iolite Chemical Formula

While comparing Legrandite 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 Legrandite and Iolite chemical formula.

Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Iolite- Mg₂Al₄Si₅O₁₈

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Legrandite and Iolite Specific Gravity

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