Azurite is a natural basic copper carbonate, and is always found along with Malachite.  Used by the Ancient Egyptians, Azurite was arguably the most important blue pigment in 15th through 17th century Europe.  Cheaper than Lapis Lazuli, Azurite was often employed in under-paintings prior to the application of Lapis.  Azurite is a striking blue-grey colour.

Lightfast, Permanent, Moderately toxic, Non-staining, Granular, Transparent

Pigment Number: PB30