Evidence of bead manufacture among the Yoruba dates as far as the 11th Century AD. Scientific evidence exists indicating that blue-green glass beads made in Ile-Ife were being traded outside the Yoruba area long before the era of European contact.
Evidence exists that the glass used in bead production by the Yoruba was indigenous to the region . The composition of the cobalt blue and blue green, segi, glass used are not found anywhere else in the world. This means that the glass and the beads made from them were manufactured in Ile Ife as part of the unique Yoruba glass making industry. Reference : Lankton, Ige, and Rehren (2006)
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THURSDAY, JANUARY 28, 2016. 3.15 p.m. [GMT]