This is a lovely piece of Prince Variscite, set in fine and sterling silver. The chain is 20" long, also sterling silver. Let me know if you'd prefer a shorter chain or if you are left handed I can switch the clasp to the left side. This stone is a natural stone, backed with a sturdy protective and cushioning material. Did you know the Native American jewelers used sawdust to back their stones? It's 30mm long and 14mm at the widest point.