Precious Opal and Azurite Physical Properties

Precious Opal

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

1.98-2.253.70-3.90

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references

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

1.6 Cleavage

Not Available

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

1.7 Mohs Hardness

5-6.53.5-4

2 10

1.8 Chemical Composition

SiO 2 · nH 2OGemdat.org , Management Team (2012)

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

Precious Opal and Azurite Chemical Formula

While comparing Precious Opal 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 Precious Opal and Azurite chemical formula.

Chemical formula of Precious Opal- SiO 2 · nH 2OGemdat.org , Management Team (2012)
Chemical formula of Azurite- Cu 3(OH) 2(CO 3) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Blue Gemstones

Precious Opal Vs Sapphire

Precious Opal Vs Sardonyx

Precious Opal Vs Sard

Precious Opal and Azurite Specific Gravity

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