This product is composed of one piece made from 18K gold-plated, natural stone, and stainless steel. To maintain its quality, we recommend avoiding wearing it during physical activity. Sweat can react with the jewelry and cause the silver chloride and copper sulfide to deteriorate and corrode over time. This item is imported and has a chain length of 6.5 inches with a 2-inch extension and weighs 0.1 oz (2.8 g).