Azurite and Black Opal Physical Properties

Azurite

Black Opal

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.70-3.901.97-2.22

1 7.18

1.5 Fracture

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

ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)

1.6 Cleavage

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

Not Available

1.7 Mohs Hardness

3.5-46-6.5

2 10

1.8 Chemical Composition

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

SiO 2 + H 2OUlrich Henn and Claudio C.

Azurite and Black Opal Chemical Formula

While comparing Azurite and Black Opal 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 Azurite and Black Opal chemical formula.

Chemical formula of Azurite- Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Black Opal- SiO 2 + H 2OUlrich Henn and Claudio C.

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Azurite and Black Opal Specific Gravity

Another important criteria for qualitative analysis of gemstones is Azurite and Black Opal Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Azurite and Black Opal Optical Properties during the identification of gemstone. Specific gravity of Azurite is 1.97-2.22 whereas that of Black Opal is 1.97-2.22.