Kolwezite, Calcite (Var: Cobaltoan Calcite)
Kolwezi, Western area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaire)
Small Cabinet, 6.6 x 5.4 x 4.9 cm
Here is a rare and beautiful association specimen from the Congo, featuring a pocket containing large (to one cm), gemmy crystals of lustrous pink cobaltoan calcite, in association with green botryoidal kolwezite (type locality, obviously) - chemical formula (Cu, Co) 2(CO3) (OH) 2.