A Note on African Amber (featured in many of these necklaces):
These are beads sold as "amber" by traders and include beads made of amber, copol, resins binding powdered amber or copol, resins, and plastics. Superb ethnic jewelry, including pieces from China, Tibet, Ethiopia, Somalia, and Mali, among others, are made from
these "amberoids." It is hard to know the exact chemical makeup of these beads but they have been sold around the world, and I can say they are "described as amber."