The Therapeutic Powers of Wearing an Azurite Malachite Ring: Fact or Fiction? Azurite malachite is a bluish-green copper carbonate mineral. It is popular for its vibrant colors and long history in arts. Because this stone has a beautiful cobalt hue, throughout history, artists have used it to grind it into dyes and paints and you can even see the color of this gemstone in some of the world’s most famous artworks. Speaking of famous artworks, you should look at the paintings made by Raphael and Hans Holbein the Younger.