Top rated picture: T. gibbosula and C. rustica shells found in layer 4c from the cave in Morocco, which had been beads from what exactly is now called the oldest jewelry on earth. Resource: A. Bouzouggar, INSAP, Morocco / Among the list of most significant aspects of Native American beadwork https://medium.com/@spoilmevintagediy/the-rich-history-of-beadwork-a-journey-through-the-ages-4e4fd2e474cf