Leading impression: T. gibbosula and C. rustica shells located in layer 4c in the cave in Morocco, which were being beads from precisely what is now known as the oldest jewelry on the earth. Resource: A. Bouzouggar, INSAP, Morocco / In the same way, you can find spots in Egypt https://medium.com/@spoilmevintagediy/the-rich-history-of-beadwork-a-journey-through-the-ages-4e4fd2e474cf