Malachite and Polyhalite Physical Properties

Malachite

Polyhalite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

3.25-4.102.78

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones (2009), Uneven

Conchoidal, Brittle

1.6 Cleavage

Perfect on { 2 01} fair on {010}

Perfect on {10 1 }; parting on {010}

1.7 Mohs Hardness

3.5-43.5

2 10

1.8 Chemical Composition

Cu₂CO₃(OH)₂

Not Available

Malachite and Polyhalite Chemical Formula

While comparing Malachite and Polyhalite 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 Polyhalite chemical formula.

Chemical formula of Malachite- Cu₂CO₃(OH)₂

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Malachite and Polyhalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Malachite and Polyhalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Malachite and Polyhalite Optical Properties during the identification of gemstone. Specific gravity of Malachite is 2.78 whereas that of Polyhalite is 2.78.