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Archaeological investigations on settlements and graveyards near the Mare de Kissi in NE Burkina Faso proved human occupation at that location at least from the 4th century BC up to the 12th/13th century AD. Among others, one important category of finds recovered from excavations are beads: about five thousand of various materials were found, especially as grave goods in the cemeteries, but also in the settlement zones. A clear imbalance in raw materials is visible between beads found in the settlement zones and those from the cemeteries: there is a trend towards low value materials in the settlement zones, while beads found in the graves demonstrate wealth and important trade relations of that society.
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Sonja Magnavita (2003) studied this question.
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