Cornetite, L'Etoile du Congo Mine, Katanga, DRC (TYPE LOCALITY)
Microcrystalline aggregates of lovely coeruleum blue cornetite, on nicely contrasting light tan host rock, with minor chrysocolla. This specimen is self-standing and presents those eye-popping sparkly shades of blue for which cornetite is so coveted. Cornetite is a rare secondary copper phosphate and the L'Etoile du Congo (“Star of the Congo”) Mine is the type locality. The mine is now closed, and specimens from the type locality rarely come to market.
