Malachite and Gahnite Physical Properties

Malachite

Gahnite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.25-4.104.00-4.62

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones (2009), Uneven

Conchoidal, Uneven

1.6 Cleavage

Perfect on { 2 01} fair on {010}

Indistinct parting on [111]

1.7 Mohs Hardness

3.5-47.5-8

2 10

1.8 Chemical Composition

Cu₂CO₃(OH)₂

ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

Malachite and Gahnite Chemical Formula

While comparing Malachite and Gahnite 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 Gahnite chemical formula.

Chemical formula of Malachite- Cu₂CO₃(OH)₂
Chemical formula of Gahnite- ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)

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Malachite and Gahnite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Malachite and Gahnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Malachite and Gahnite Optical Properties during the identification of gemstone. Specific gravity of Malachite is 4.00-4.62 whereas that of Gahnite is 4.00-4.62.