Leading picture: T. gibbosula and C. rustica shells found in layer 4c from the cave in Morocco, which had been beads from what's now referred to as the oldest jewelry on the planet. Supply: A. Bouzouggar, INSAP, Morocco / With the Ancient Egyptians glass was considered a synthetic semi-precious stone https://210list.com/story18990569/getting-my-victorian-beadwork-to-work