Malachite and Wulfenite Physical Properties

Malachite

Wulfenite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.25-4.106.50-7.00

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones (2009), Uneven

Irregular, Brittle, Conchoidal

1.6 Cleavage

Perfect on { 2 01} fair on {010}

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

1.7 Mohs Hardness

3.5-43

2 10

1.8 Chemical Composition

Cu₂CO₃(OH)₂

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

Malachite and Wulfenite Chemical Formula

While comparing Malachite and Wulfenite 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 Malachite and Wulfenite chemical formula.

Chemical formula of Malachite- Cu₂CO₃(OH)₂
Chemical formula of Wulfenite- PbMoO 4Walter Schumann , Gemstones of the world (2001)

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Malachite and Wulfenite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Malachite and Wulfenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Malachite and Wulfenite Optical Properties during the identification of gemstone. Specific gravity of Malachite is 6.50-7.00 whereas that of Wulfenite is 6.50-7.00.