“10.7 x 8.4 x 3.0 cm. Cornetite is a rare Cu-phosphate and this famous Katanga mine is the Type Locality. This large, rich and colorful two-sided curved rib is nearly totally covered with sparkly dark teal-blue cornetite. The obverse features spherical aggregates of cornetite, powder-blue chrysocolla and black heterogenite. Rich, choice and uncommon large combination material from this locale.
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Robert Lavinsky - 17th April 2016