Adamite and Malachite Physical Properties

Adamite

Malachite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

4.32-4.48

3.25-4.10

1.5 Fracture

Uneven, Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Uneven, Subconchoidal, Brittle, Metallic, Brittle, Metallic

Conchoidal, Conchoidal, Gemstones (2009), Uneven

1.6 Cleavage

{101}, good; {010}, poor

Perfect on { 2 01} fair on {010}

1.7 Mohs Hardness

3.5

3.5-4

1.8 Chemical Composition

Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)

Cu₂CO₃(OH)₂

Adamite and Malachite Chemical Formula

While comparing Adamite 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 Adamite and Malachite chemical formula.

Chemical formula of Adamite- Zn 2(AsO 4)(OH)Michael OâDonoghue , Gems, Sixth edition (2006)
Chemical formula of Malachite- Cu₂CO₃(OH)₂

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Adamite and Malachite Specific Gravity

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