Onyx and Azurite Physical Properties

Onyx

Azurite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.55-2.703.70-3.90

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Indiscernible

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

1.7 Mohs Hardness

6.5-73.5-4

2 10

1.8 Chemical Composition

SiO₂

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

Onyx and Azurite Chemical Formula

While comparing Onyx 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 Onyx and Azurite chemical formula.

Chemical formula of Onyx- SiO₂
Chemical formula of Azurite- Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

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Onyx and Azurite Specific Gravity

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