| 31. | Smithsonite occurs as a secondary mineral in the weathering or oxidation zone of zinc-bearing ore deposits.
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| 32. | Delafossite is usually a secondary mineral that crystallizes near oxidized copper and is rarely a primary mineral.
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| 33. | Erythrite occurs as a secondary mineral in the oxide zone of Co Ni As bearing mineral deposits.
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| 34. | It occurs as a secondary mineral in mineral gossans, coal deposits, phosphate rich pegmatites and cave guano deposits.
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| 35. | There are also conical-shaped stalactites, secondary mineral deposits of silica and earthen deposits covering the walls and ceiling.
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| 36. | Devilline is a rare and unusual secondary mineral found in the oxidized portions of copper sulfide ore deposits.
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| 37. | Copiapite is strictly a secondary mineral forming from the weathering or oxidation of iron sulfide minerals or sulfide-rich coal.
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| 38. | It occurs as a secondary mineral in the oxidized weathering zone of hydrothermal uranium ore deposits which contain arsenic.
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| 39. | At the Tanza location it occurs as a secondary mineral formed by the oxidation of native bismuth or bismuthinite.
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| 40. | It is a rare secondary mineral found in complex granite pegmatites where it forms by weathering of earlier phosphate minerals.
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