Legrandite and Zoisite Physical Properties

Legrandite

Zoisite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.98-4.043.20-3.50

1 7.18

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Fracture

Conchoidal

Uneven, Conchoidal, Even

Cleavage

Imperfect, poor one {100}

Perfect {010} imperfect {100}

Mohs Hardness

4.5-56-7

2 10

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Chemical Composition

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

Ca₂Al₃(SiO₄)₃(OH)

Legrandite and Zoisite Chemical Formula

While comparing Legrandite and Zoisite 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 Zoisite 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 Zoisite- Ca₂Al₃(SiO₄)₃(OH)

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Legrandite and Zoisite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Legrandite and Zoisite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Legrandite and Zoisite Optical Properties during the identification of gemstone. Specific gravity of Legrandite is 3.20-3.50 whereas that of Zoisite is 3.20-3.50.