Best image: T. gibbosula and C. rustica shells located in layer 4c from the cave in Morocco, which ended up beads from what's now often known as the oldest jewelry on this planet. Resource: A. Bouzouggar, INSAP, Morocco / With the Ancient Egyptians glass was thought to be a synthetic https://medium.com/@spoilmevintagediy/the-rich-history-of-beadwork-a-journey-through-the-ages-4e4fd2e474cf