Malachite is a green copper carbonate that was one of the first minerals mined as a copper ore. Today it is used most often for ornamental purposes, as it has been for thousands of years. The first copper mines date back 4000 years ago in Egypt and Isreal. It was also one of the earliest green pigments. Malachite often forms as stalactites and stalagmites in limestone above copper deposits. Solutions descending through the limestone dissolve and incorporate carbonate, and then this solution reacts with the copper deposits. The mineral precipitates out in drops within cavities in the limestone. As a result, malachite often has concentric circles formed from the rings of deposits of the cave formations.
As the color of nature, the green of malachite promotes personal growth and stability.