The Clam Shell Necklace is made from the molding and casting of a real found Venus Clam shell in recycled silver. I collected the original empty mollusk shell on a beach in Delray, Florida and then sent it to a local, family owned casting company to be cast in multiples of solid metal. Once the casting is returned, I solder on jump rings and the piece is cleaned up and hand polished with care to be strung on a 16”, 18” or 20” sterling silver cable chain of your choice. The shell charm is only 1" long including bail and 1/2" wide. This design is currently available in solid Oxidized or Polished sterling silver but other metals are always available, message me for custom options and a quote. All HKM Jewelry pieces are properly hallmarked for metal type and stamped for authenticity.