Thumbnail, 2.4 x 2.2 x 1.6 cm
Kamoya South II Mine, Katanga, Democratic Republic of Congo
Ex. Paul Otto
Though well known now, carrollite used to be quite uncommon until the finds in the DRC in the 1990s. Carrollite is a rare copper, cobalt, nickel sulfide, with the very finest of the species coming from the DRC. This excellent intergrown thumbnail is sharp, well-defined, and has a bright metallic luster. From the collection of Paul Otto.