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Cobaltoan dolomite -
Mashamba West Mine, Katanga, DR Congo.
Cobaltoan dolomite crystals with some green malachite.
The bottom of the specimen has been sawn.
Size of specimen 72x118 mm and 21 mm thick.
Dolomite crystals up to 4 mm. Malachite 2 mm.
Weight 156 grams.