Wulfenite and Zoisite Physical Properties

Wulfenite

Zoisite

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Physical Properties

Tenacity

Brittle

Solubility

Durability

Specific Gravity

6.50-7.003.20-3.50

1 7.18

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Fracture

Irregular, Conchoidal

Uneven, Conchoidal, Even

Cleavage

On {011}, distinct; on {001}, {013}, indistinct

Perfect {010} imperfect {100}

Mohs Hardness

36-7

2 10

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Chemical Composition

PbMoO 4Walter Schumann , Gemstones of the world (2001)

Ca₂Al₃(SiO₄)₃(OH)

Wulfenite and Zoisite Chemical Formula

While comparing Wulfenite 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 Wulfenite and Zoisite chemical formula.

Chemical formula of Wulfenite- PbMoO 4Walter Schumann , Gemstones of the world (2001)
Chemical formula of Zoisite- Ca₂Al₃(SiO₄)₃(OH)

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Wulfenite and Zoisite Specific Gravity

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