Best graphic: T. gibbosula and C. rustica shells found in layer 4c of the cave in Morocco, which have been beads from what exactly is now referred to as the oldest jewelry in the world. Resource: A. Bouzouggar, INSAP, Morocco / Upgrading to a quality membership gives you access to https://medium.com/@spoilmevintagediy/the-rich-history-of-beadwork-a-journey-through-the-ages-4e4fd2e474cf