Malachite Thread Pendant size 3 to 4 cm. comes in various shapes like tear drop, oval and round. In the Book of Stones, Robert Simmons tells us that Malachite is one of the most important stones for protection from negative energy. He notes it emanates the healthiest energy pattern for your heart. Malachite is a green copper carbonate hydroxide mineral with a chemical composition of Cu2(CO3)(OH)2. It was one of the first ores used to produce copper metal. Naisha Ahsian in the same book tells us that Malachite is excellent for burning through the fog of emotional confusion. She also notes it is excellent for helping turn creative ideas into reality.