925 sterling silver necklace, carved bi-color tourmaline necklace, adjustable chain necklace, gemstone necklace, handmade jewelry for gifts. Metal purity : 925 sterling silver. Necklace length : 18 inches with adjustable chain.Tourmaline is thought to be for people who bear a broken heart, as it encourages love, gently disperses emotional pain and dissolves disruptive feelings. It calms the negative emotions that upset relationships. This item is made of tourmaline and stone, silver.