Carrolite on Calcite | Barras-Gautier-Min.https://static.wixstatic.com/media/daf8af_3f2d05f072c94cbbaeafddfefa92084c~mv2.jpg/v1/fit/w_500,h_500,q_90/file.jpg Dimensions: 2.3 x 1.8cm Origin: Kamoya II mine, Kambove district, Katanga, Rep. Dem. from Congo An excellent quality single crystal for this rare sulphide of cobalt, nickel and copper from Katanga. The octahedron rests on a beautiful crystallization of calcite. (crystal size 10mm) Dimensions without the acrylic base, which is supplied with the mineralogical specimen. The mineral is not glued to the base (soft putty).