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Azurite (Cu3(CO3)2(OH)2)

blue azurite mineral

Azurite is formed by the weathering of other copper minerals. 

The copper gives it its basic colour but the presence of water in the crystals help it turn bright blue. 

Data Panel: Copper Carbonate: Azurite
Cu3(CO3)2(OH)2
colour
Deep blue crystals; pale blue masses and crusts
hardness
3.5-4
Crystal system
Monoclinic
Crystal habit
Prisms and tablets
Lustre
Vitreous to dull
Streak
Sky blue
Fracture
Conchoidal, brittle
Other characteristics
 

 

 Photograph reproduced with the kind permission of the Geevor Archive

 


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Comment left by Peter Barnes on 2010-10-19 12:05:53

Your data on the Azurite page says: "Data Panel: Iron Sulphide: Azurite" But azurite is iron carbonate, not sulphide (as shown by your correct formula).

Comment left by Peter Barnes on 2010-10-19 12:08:47

Re my previous comment - I should have said azurite is copper carbonate! Now we've both been wrong! ............ GEEVOR REPLY: Thank you for pointing our typing error out to us Peter, we have now amended it above.

 

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