Malachite and Oligoclase Physical Properties

Malachite

Oligoclase

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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

3.25-4.102.62-2.67

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones (2009), Uneven

Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven

1.6 Cleavage

Perfect on { 2 01} fair on {010}

From the Greek, oligos and kasein, little cleavage.

1.7 Mohs Hardness

3.5-46-6.5

2 10

1.8 Chemical Composition

Cu₂CO₃(OH)₂

Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

Malachite and Oligoclase Chemical Formula

While comparing Malachite and Oligoclase 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 Oligoclase chemical formula.

Chemical formula of Malachite- Cu₂CO₃(OH)₂
Chemical formula of Oligoclase- Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)

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Malachite and Oligoclase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Malachite and Oligoclase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Malachite and Oligoclase Optical Properties during the identification of gemstone. Specific gravity of Malachite is 2.62-2.67 whereas that of Oligoclase is 2.62-2.67.