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Carrollite With Bornite

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PDM673225

Carrollite With Bornite

Classic Locality

Description Tabs

Description
Locality: 
Kamoto Principal Mine, Kamoto, Kolwezi, Lualaba, DR Congo
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.3 × 2.7 × 1.8 cm
Description

Silver grey lustrous carrollite crystals that grew in a space between white calcite crystals. Some parts of the carrollite are overgrown by a thing coating of black bornite. These old carrollites from Kamoto, found in the 1950’s and 1960’s were the world-best until the Kamoya finds in the 1990’s, so the specimen has to be understood in this context.

Ex. Dr. Bob Janssens specimen, #85.

Mineral Data
What's on the rock

Carrollite

Formula: 
Cu(Co,Ni)2S4
Strunz: 
2.DA.05
Crystal System: 
Isometric
Hardness: 
4.5 - 5.5
Type Locality: 
Patapsco mine (Finksburg Mine; Orchard Mine), Patapsco Mines, Finksburg, Sykesville, Carroll Co., Maryland, USA

Bornite

Formula: 
Cu5FeS4
Strunz: 
2.BA.15
Crystal System: 
Tetragonal
Hardness: 
3.0
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

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