A bright blue mixture of azurite
was found together with malachite
at the beginning of 2012 in the southern part of Moquegua department, close to the border with Tacna department. It forms veins up to 15 mm thick. Azurite
properties: density 3.70 - 3.90, hardness 3.5 - 4.
Dark blue massive dumortierite
occurs near Torata, about 20 km NE of Moquegua.
Ref: J. Hyrsl, Gemstones of Peru, 2012, pp. 37, 49