PHIL HILL / SCIENCE PHOTO LIBRARY PHIL HILL / SCIENCE PHOTO LIBRARY
Artisanal mining. Child worker with bags of gossan stones ready for processing. Iron in the stone has rusted on contact with the air, giving it a deep red colour. The presence of iron indicates the presence of other metals, including gold. The stone will be ground to extract these metals. Photographed in Macalder, Kenya.
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