Azurite is quite abundant and is a basic carbonate of copper; an ore of copper. Over time as it absorbs water, it changes into the green mineral malachite. The two minerals are often found together in the ground and form an azurite-malachite rock that is blue-green in color. 

Chemical composition Cu3(CO3)(OH)2
Color Blue to Dark Blue
Lustre Vitreous, Chalky
Hardness 3.5-4
Crystal system Monoclinic
Origin Namibia
Healing properties*

Stimulates deep levels of consciousness; increases subtle communication skills such as intuition, creativity; releases deep stresses. Draws out old memories and allows them to be released in healing.

Many legends concerning its healing properties are related by Kozminksy and Kunz; banishes fear, protects children. The name Azurite comes from Persian lazhward, meaning blue color, and has indeed been used as blue pigment for paintings through history. This has caused occasional problems on antique paintings, when a Azurite altered to green malachite