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Medieval Aggrey and Yoruba Koli drawn glass beads. Early German and Middle
Eastern Production dating from ca 900 AD onwards and found in Mali and Burkina Faso .. as a result of ancient trans-Saharan trading routes following the River Niger.. they have lovely translucent blue / green colours when
backlit. The light blue opaque cylinders are cooked Koli .. early European glass, once translucent, but now mostly opaque from having been cooked in Africa.
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