Best impression: T. gibbosula and C. rustica shells located in layer 4c from the cave in Morocco, which ended up beads from what is now generally known as the oldest jewelry on the globe. Source: A. Bouzouggar, INSAP, Morocco / Ancient Egyptians created quite a few objects out of faience. https://renaissance-bead-trade10741.ambien-blog.com/37392421/the-best-side-of-popular-bead-materials