These were made using delicate 18k gold plated brass chain. In the center of each is a 12mm iridescent white Mother of Pearl connected by 16k gold plated caps. The clasps at the closure of the necklaces are ornate hooks. All connecting rings are 18k gold plated. * Your purchase will arrive in pretty packaging CARE INSTRUCTIONS FOR PEARLS: To keep pearls radiant, follow the "last on, first off" ruleāput them on after makeup and perfume to avoid chemical damage. Gently wipe them with a soft cloth after each wear to remove oils and perspiration. Store them separately in soft, breathable pouches to prevent scratches and dehydration.