Topaz and Malachite Physical Properties

Topaz

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

3.49-3.57

3.25-4.10

1.5 Fracture

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

Conchoidal, Conchoidal, Gemstones (2009), Uneven

1.6 Cleavage

[001] Perfect

Perfect on { 2 01} fair on {010}

1.7 Mohs Hardness

3.5-4

1.8 Chemical Composition

Al₂SiO₄(F,OH)₂

Cu₂CO₃(OH)₂

Topaz and Malachite Chemical Formula

While comparing Topaz 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 Topaz and Malachite chemical formula.

Chemical formula of Topaz- Al₂SiO₄(F,OH)₂
Chemical formula of Malachite- Cu₂CO₃(OH)₂

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Topaz and Malachite Specific Gravity

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