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1.1" Lustrous Chalcocite Crystal Cluster - Congo (Brazzaville)
This is a 1.1" wide cluster of chalcocite crystals, collected from the M`passa Mine located within the Mindouli District of the Republic of the Congo (Brazzaville). It has been mounted to an acrylic display base with mineral tack.
About Chalcocite
Chalcocite is a copper sulfide mineral (Cu₂S) prized for its metallic luster, striking lead-gray to silvery coloration, and exceptionally high copper content. It typically forms in massive, granular, or compact habits, though well-defined pseudohexagonal crystals can occur in exceptional deposits. Fresh chalcocite surfaces display a brilliant metallic sheen, while older specimens may show iridescent blues and purples due to natural tarnish. As one of the most important secondary copper minerals, chalcocite commonly develops in the enriched zones of copper ore bodies through supergene processes, replacing earlier sulfides such as chalcopyrite or bornite.
Chalcocite is a copper sulfide mineral (Cu₂S) prized for its metallic luster, striking lead-gray to silvery coloration, and exceptionally high copper content. It typically forms in massive, granular, or compact habits, though well-defined pseudohexagonal crystals can occur in exceptional deposits. Fresh chalcocite surfaces display a brilliant metallic sheen, while older specimens may show iridescent blues and purples due to natural tarnish. As one of the most important secondary copper minerals, chalcocite commonly develops in the enriched zones of copper ore bodies through supergene processes, replacing earlier sulfides such as chalcopyrite or bornite.
SPECIES
Chalcocite
LOCATION
M`passa Mine, Mindouli District, Pool Department, Republic of the Congo
SIZE
1.1 x .9"
CATEGORY
ITEM
#304370
