Yes,I agree with you. the european did need to lure back the africans to trade with them, they made copies with designs that they knew and that represented a value. I have the same beads as those of your necklace, and I did note, at the level of the hole, that the glass was rolled up, they are obviously European, perhaps venetian.
These beads, here, are different: the glass powder is not european, I think so, and the glass around the hole is not rolled up, and it is wider, not regular. What do you think about the biconic too?: I have many venetian biconic and these are very different. I would think that they are african.