Malachite and Azurite are both simple Copper carbonates. Azurite occurs as a secondary mineral in the oxidized zones of copper deposits. Where as Malachite occurs as an alteration product in the oxidized zones of copper deposits. They are chemical twins. The only differences is that Azurite holds less water than Malachite. Azurite and Malachite are often mixed together and make great looking Specimens. This Azurite & Malachite mineral specimen is from the Jiangxi Province, near Dexing China. This is a very good specimen. The close up picture shows some of the chatoyant malachite clusters that look like shiney little toadstools. The dark areas are pocks nearley an inch deep, lined with azurite crystals . This is a very interesting specimen. The back side isn't much but the front is spectacular.