Top rated impression: T. gibbosula and C. rustica shells found in layer 4c with the cave in Morocco, which ended up beads from what exactly is now referred to as the oldest jewelry on this planet. Resource: A. Bouzouggar, INSAP, Morocco / The intricate styles and colors of Maasai beadwork https://medium.com/@spoilmevintagediy/the-rich-history-of-beadwork-a-journey-through-the-ages-4e4fd2e474cf