MALACHITE , Cu2CO3(OH)2 - Copper Carbonate Hydroxide. A dark green Stalactite of Polished Malachite with a drip hole thru it. Unique. Specimen is 7.6 cm (2-7/8") tall by 1.5 cm (11/16") wide at finger and 3.3 cm (1-3/8") wide at base. Base is sawn flat. From Zaire, Africa. Weight 0.16 lbs.