Galena and Azurite Physical Properties

Galena

Azurite

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

6.233.70-3.90

1 7.18

1.5 Fracture

Subconchoidal, Brittle, Metallic

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

1.6 Cleavage

Cubic perfect on [001], parting on [111]

Perfect on {011}, fair on {100}, poor on {110}

1.7 Mohs Hardness

2.5-2.753.5-4

2 10

1.8 Chemical Composition

PbS

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

Galena and Azurite Chemical Formula

While comparing Galena and Azurite 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 Galena and Azurite chemical formula.

Chemical formula of Galena- PbS
Chemical formula of Azurite- Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Galena and Azurite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Galena and Azurite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Galena and Azurite Optical Properties during the identification of gemstone. Specific gravity of Galena is 3.70-3.90 whereas that of Azurite is 3.70-3.90.