Prime graphic: T. gibbosula and C. rustica shells found in layer 4c on the cave in Morocco, which were being beads from what's now often known as the oldest jewelry in the world. Source: A. Bouzouggar, INSAP, Morocco / Among the list of most important facets of Native American beadwork https://medium.com/@spoilmevintagediy/the-rich-history-of-beadwork-a-journey-through-the-ages-4e4fd2e474cf