Carrollite with Chalcopyrite on Calcite - image 1
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Carrollite with Chalcopyrite on Calcite

Unknown Owner
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Compared with almost everywhere else, the quality of Carrollite crystals from Kamoya South II mine, Kambove District, Katanga Copper Crescent, Dem. Rep. of Congo are sensational. This small cabinet specimen from there is not perfect in the sense that if we are being extremely fussy it does have some slight damage in areas, but if it was from anywhere else my hand would be bitten off for it. In terms of the quality of the individual crystals they are so stunningly reflective, like small silver mirrors. Many present exceptional octahedral form, but the larger they get (on this specimen), the more tarnished they appear. Nevertheless, their shape is wonderful. The largest crystals on this specimen reach 7 or 8 mm across. Combined with this, the accompanying Calcite crystals are really gemmy too. Specimens of any quality are becoming harder and harder to source, so these Carrollites can surely only go up in rarity value.

Product details

SizeSmall Cabinet
Dimensions5.8 x 7.5 x 4.2 cm
Added on10/01/2025

Known provenance

DateCollectorAcquisition price
07/2026Unknown Owner$250.00
Crystal ClassicsNot disclosed

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Mineral guide
Learn about Carrollite
cobalt-rich thiospinel with razor-sharp spinel-octahedral crystals, mirror luster, on contrasting carbonate matrices from the DRC and Bou Azzer.
Carrollite
Regional guide
Carrollite from Kamoya South II Mine, DR Congo
Kamoya South II is the modern benchmark locality for carrollite. Its best specimens have the look that made the species famous among contemporary sulfide collectors: brilliant silver to steel-gray crystals, often mirror-faced, with crisp spinel-family geometry set into pale calcite or dolomitic carbonate. The visual effect is unusually clean for a sulfide—hard, metallic geometry against light matrix—and the finest examples have enough reflectivity that the faces flash like cut metal when turned under a lamp.