Zoisite and Legrandite Physical Properties

Zoisite

Legrandite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

3.20-3.503.98-4.04

1 7.18

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Fracture

Uneven, Conchoidal, Even

Conchoidal

Cleavage

Perfect {010} imperfect {100}

Imperfect, poor one {100}

Mohs Hardness

6-74.5-5

2 10

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Chemical Composition

Ca₂Al₃(SiO₄)₃(OH)

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

Zoisite and Legrandite Chemical Formula

While comparing Zoisite and Legrandite 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 Zoisite and Legrandite chemical formula.

Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)
Chemical formula of Legrandite- Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Zoisite and Legrandite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Zoisite and Legrandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Legrandite Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 3.98-4.04 whereas that of Legrandite is 3.98-4.04.