Best viewed using Adobe Flash Player (8 or higher).
Download hereGENERAL DESCRIPTION
Carrollite is a nickel, cobalt and copper sulfide. It is formed in the metalliferous hydrothermal deposits.
The crystals are octahedral, up to 10 cms. They of gray in colour, silver-like plated, opaque and they often have an spectacular metallic lustre.
Carrollite is present in many deposits: the Gunson Mount mine in Australia; the Hetaoqing deposit in the Chinese province of Hunan, the Bou Azzer district in Morocco. The largest crystals are coming from Kambove in the RD Congo (former Zaire).
In France, two localities are known; the Clausis (Saint-Véran, Hautes-Alpes) and the Finosa mine (or Fontana Rossa mine) close to Ghisoni (Corte, Corsica).
The place of conservation of the type of this species is unknown. The mineral-type had been extracted from the Patapsco mine in Finksburg, Carroll Co. (Maryland, USA).
HISTORY : Named inspired from its type-locality: Carroll Co, USA
Species first described in 1852 by W.L. Faber
Type-locality: Mine Patapsco, Finksburg, Caroll Co, Maryland, USA
CHEMICAL FORMULA : Cu (Co,Ni)2 S4
CRYSTAL SYSTEM : Cubic
COLOR : Steel gray
DIAPHANIETY : Opaque
LUSTER : Metallic
MORPHOLOGIE : Octahedral crystals, massive
HARDNESS : 4,5-5,5
CHEMICAL CLASS: 4,83
DENSITY : II - Sulfures, sulfosels
GROUP : Linnaeite
STRUNZ CLASS BEFORE 2001 : 2/D.01-40
STRUNZ CLASS AFTER 2001 : 2.DA.05
