Mikimoto 18ct White Gold 8mm White A+ Akoya Pearl Necklace, PP 20078 W 8. Over a century ago, Kokichi Mikimoto succeeded in creating the world\'s first cultured pearl. His quest for perfection and his love for these pure, lustrous gems of the sea were the guiding forces that built the house of Mikimoto. This classic Mikimoto necklace is a simple but stunning piece that features an 8mm Grade A+ white Akoya cultured pearl set on an elegant 18ct white gold chain, adjustable from 40 to 43cm in length. The necklace comes beautifully packaged in a unique Mikimoto presentation box with a certificate of authenticity.