Mineralpedia Details for Carrollite
Carrollite
Named after the type locality at the Patapsco mine near Sykesville in Carroll County, Maryland, USA. Carrollite is an uncommon mineral that can be found in additional USA localities, Mexico, Chile, Bulgaria, Slovakia, Germany, Sweden, Namibia, the Democratic Republic of the Congo, Zambia, Zimbabwe, Japan, North Korea, and Australia, among several others. Carrollite occurs in hydrothermal vein deposits with associated minerals which include tetrahedrite, linnaeite, siegenite, polydymite, chalcopyrite, bornite, digenite, djurleite, chalcocite, pyrrhotite, pyrite, sphalerite, millerite, gersdorfite, ullmannite, and cobaltoan calcite.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/carrollite.pdf
- Formula
- Cu1+Co2S4
- Crystal System
- Isometric
- Cleavage
- Indistinct, None, None
- Luster
- Metallic
- Color
- gray, gray, copper red, light gray, steel
- Class
- Isometric - Hexoctahedral
- Fracture
- Conchoidal
- Hardness
- 4.5-5.5
- WebMineral
- View Carrollite
- Mindat
- View Carrollite
Carrollite from Kamoya South mine, Katanga, Congo
Brilliant silver, metallic modified cubes of Carrollite crystals to 1.5cm.
Carrollite from Kambove dist., Katanga, Democratic Republic of Congo
Silvery euhedral crystal to 8mm with mirror-like luster aside "melted" Chalcopyrite crystals on Calcite matrix.
A small group of grey tarnished Carrollite crystals with dodecahedral forms.
Carrollite from Shinkolobwe, Katanga, Democratic Republic of Congo
Excellent silvery cubic crystals to 1cm.
Carrollite from Shaba Cu belt, Democratic Republic of Congo
A 2cm crystal showing 6 faces in matrix with other sulfides and Calcite.
Carrollite from Rokana mine, Kitwe, Copperbelt Province, Zambia
A large partial Carrollite crystal with sides to 2.5cm.
