7.0-7.5mm Black Saltwater Akoya Cultured Pearl High Luster Necklace 18" with sterling silver clasp 7.0-7.5mm Black Saltwater Akoya Cultured Pearl High Luster Necklace 18" with sterling silver clasp. Most Appreciated Gift. Most elegant jewelry boxes with most beautiful presentation. See "Special Offers & Product Promotions" below for our current coupon offers. Free gift promotions require that the free gift item be added to your cart plus you must apply the coupon code during checkout. Any questions or request about cultured pearls quality, size, setting, metal type, Please do not hesitate to contact us! We are always be here and happy to assist you!