Gahnite and Malachite Physical Properties

Gahnite

Malachite

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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

4.00-4.623.25-4.10

1 7.18

1.5 Fracture

Conchoidal, Uneven

Conchoidal, Conchoidal, Gemstones (2009), Uneven

1.6 Cleavage

Indistinct parting on [111]

Perfect on { 2 01} fair on {010}

1.7 Mohs Hardness

7.5-83.5-4

2 10

1.8 Chemical Composition

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

Cu₂CO₃(OH)₂

Gahnite and Malachite Chemical Formula

While comparing Gahnite 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 Gahnite and Malachite chemical formula.

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

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Gahnite and Malachite Specific Gravity

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