Mikimoto 18ct yellow gold 8mm akoya pearl ringmkm520 this beautiful 18ct yellow gold 8mm akoya pearl ring is simple and classic in design over a century ago kokichi mikimoto succeeded in creating the worlds 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 mikimoto 18ct yellow gold 8mm akoya pearl ring