MALACHITE , Cu2CO3(OH)2 - Copper Carbonate Hydroxide. To show off its beautiful designs and patterns the botryoidal upper surface of this natural copper malachite was polished. Highly polished and lustrous, free form, Malachite. These babies can be used as paperweight or as simple decorative objects in your collection, home or office.  Weight 0.95 lbs. From Katanga, Democratic Republic of Congo ( Formerly Zaire), Africa.