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Carrollite

• 
  Kamoya South II Mine (Kamoya Sud Mine; Kamoya South Mine), Kamoya, Kambove District, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
  © Peter Haas

• Formula:
  Cu(Co,Ni)₂S₄

• System: Isometric

• Name:
  After the type locality in Carroll County, Maryland, USA.

• IMA Status: Valid (Grandfathered)

• Type Locality:
  Patapsco mine (Patapsco Mines; Finksburg Mine; Wildesen Mine; Orchard Mine), Finksburg, Sykesville, Carroll Co., Maryland, USA

• Dana 8th: 2.10.1.2
  
  2 : SULFIDES
  10 : A_mB_nX_p, with (m+n):p = 3:4

• Hardness (Mohs): 4½ - 5½

• Density: 4.5 g/cm³ to 4.8 g/cm³ (measured)
  4.83 g/cm³ (calculated)

• Lustre: Metallic

• Diapheny: Opaque

• Diapheny: very brittle

• Colour: Bright Silver color

• Streak: Gray black