Polyhalite and Malachite Physical Properties

Polyhalite

Malachite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.783.25-4.10

1 7.18

1.5 Fracture

Conchoidal, Brittle

Conchoidal, Conchoidal, Gemstones (2009), Uneven

1.6 Cleavage

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

Perfect on { 2 01} fair on {010}

1.7 Mohs Hardness

3.53.5-4

2 10

1.8 Chemical Composition

Not Available

Cu₂CO₃(OH)₂

Polyhalite and Malachite Chemical Formula

While comparing Polyhalite and Malachite 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 Polyhalite and Malachite chemical formula.

Chemical formula of Malachite- Cu₂CO₃(OH)₂

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Polyhalite and Malachite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Malachite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Malachite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.25-4.10 whereas that of Malachite is 3.25-4.10.