Mikimoto 18ct White Gold 0.27ct Diamond Grade A Pearl Necklace. PPL 10184D W. 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 elegant Mikimoto necklace features an exquisite white Grade A Akoya cultured pearl 8mm in size and is embellished with 0.27ct round brilliant cut diamonds in a feminine, intricate design. The pendant sits gracefully on an 18ct white gold chain and would be a beautiful addition to any jewellery lovers collection. The necklace comes beautifully packaged in a unique Mikimoto presentation box with certificate of authenticity.