Top rated graphic: T. gibbosula and C. rustica shells present in layer 4c on the cave in Morocco, which ended up beads from exactly what is now referred to as the oldest jewelry on the earth. Source: A. Bouzouggar, INSAP, Morocco / They may be concealed by an enormous passage https://medium.com/@spoilmevintagediy/the-rich-history-of-beadwork-a-journey-through-the-ages-4e4fd2e474cf