Dolomite and Malachite Physical Properties

Dolomite

Malachite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Poorly soluble in dilute HCl

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.80-2.953.25-4.10

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

Conchoidal, Conchoidal, Gemstones (2009), Uneven

1.6 Cleavage

Perfect on {10 1 1}, rhombohedral cleavage

Perfect on { 2 01} fair on {010}

1.7 Mohs Hardness

3.5-43.5-4

2 10

1.8 Chemical Composition

CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Cu₂CO₃(OH)₂

Dolomite and Malachite Chemical Formula

While comparing Dolomite 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 Dolomite and Malachite chemical formula.

Chemical formula of Dolomite- CaMg(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Malachite- Cu₂CO₃(OH)₂

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Dolomite and Malachite Specific Gravity

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