The azurite is known since the antiquity. It is found in the cosmetics from the Egyptians of the Fourth Dynasty.
Azurite is formed by oxidation of copper sulphide deposits associated with carbonate rocks. It is often associated with malachite and together form azurite-malachite.
Azurite is soluble in acids and ammonia. The heat destroys its color.
Azurite was much used in the Middle Ages as a pigment in paintings.
To know more about the mineralogy of the azurite, see mindat.org ->
