Posted by: Hans Post Reply
Yes, I remember the dealer at the Duijf and have send him the picture.
He told me the chuncks were collected in Mali, near Mopti. It is a kind of clumped together iron sand (iron ore) and it was found around the roots of plants. So the perforation is left behind by the removed roots and some holes were reamed to be able to thread.
Afterwards I have never seen these kind of beads again.
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