This MIX color southsea shell pearl necklace is 40"" in length, the Shell Pearls are organic and made from real oysters, each pearl's diameter is 12mm, they have a genuine mother of pearl beaded interior for added weight and value. Hand polished to a Superior luster, Perfectly Round, Excellent surface quality, Professionally hand knotted by silk thread 9k clasp. color: black ,green,gray,blue,white,copper necklace length :40"" pearl diameter :12mm