Cornetite Crystals from the Star of the Congo Mine



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These cornetite crystals are from the Star of the Congo Mine (L’toile du Congo Mine) in Lubumbashi, Katanga, Congo.This area is in the Katanga Copper Cresent which contains many copper and copper mineral deposits. Cornetite is a copper sulfate containing the containing the elements Cu, P, O and H. This specimen consists of a sandstone matrix with contrasting blue crystals of cornetite chrysocolla and pseudomalachite. The cornetite crystals vary in morphology from, dipyramidal and double terminated to minute crystal clusters. They have a bright vitreous luster. The largest crystals measure approximately 2 mm. This piece measures 2 x 1 3/4 x 1 inches or 50 x 45 x 26 mm.

Additional information

Weight7 oz

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