Lazurite and Malachite Physical Properties

Lazurite

Malachite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.75

3.25-4.10

1.5 Fracture

Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle

Conchoidal, Conchoidal, Gemstones (2009), Uneven

1.6 Cleavage

Imperfect on {110}

Perfect on { 2 01} fair on {010}

1.7 Mohs Hardness

5.5

3.5-4

1.8 Chemical Composition

(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.

Cu₂CO₃(OH)₂

Lazurite and Malachite Chemical Formula

While comparing Lazurite 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 Lazurite and Malachite chemical formula.

Chemical formula of Lazurite- (Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Chemical formula of Malachite- Cu₂CO₃(OH)₂

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Lazurite and Malachite Specific Gravity

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