Malachite and Realgar Physical Properties

Malachite

Realgar

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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

3.25-4.103.56

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones (2009), Uneven

(e.g. graphite).

1.6 Cleavage

Perfect on { 2 01} fair on {010}

{010} Good

1.7 Mohs Hardness

3.5-4Not Available

2 10

1.8 Chemical Composition

Cu₂CO₃(OH)₂

AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

Malachite and Realgar Chemical Formula

While comparing Malachite and Realgar 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 Realgar chemical formula.

Chemical formula of Malachite- Cu₂CO₃(OH)₂
Chemical formula of Realgar- AsSMichael OâDonoghue , Gems, Sixth Edition (2006)

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Malachite and Realgar Specific Gravity

Another important criteria for qualitative analysis of gemstones is Malachite and Realgar Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Malachite and Realgar Optical Properties during the identification of gemstone. Specific gravity of Malachite is 3.56 whereas that of Realgar is 3.56.