Top impression: T. gibbosula and C. rustica shells present in layer 4c in the cave in Morocco, which were beads from what is now often known as the oldest jewelry on the earth. Source: A. Bouzouggar, INSAP, Morocco / One of the most significant areas of Native American beadwork is https://native-american-bead-trad71345.blogs-service.com/62090569/art-nouveau-beadwork-fundamentals-explained