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Blackrock Iron Ore Project Mining Canada

black rock mine, black rock, kalahari manganese field, northern cape, south africa : a no specimens have ever been recorded from this mine and it was closed many years before. peacor, d.r., dunn, p.j., duggan, m. (1983) sturmanite, a ferric iron, boron analogue of ettringite. canadian mineralogist: 21: 705-709.

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