Mikimoto M Code 18ct Yellow Gold White Akoya Pearl Necklace, PP 20552 K. 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. 6.5-6.75mm Akoya cultured pearls set in 18ct yellow gold. The chain is approx. 24\" long with a lobster claw hook and an oval jump ring. The necklace will arrive beautifully packaged in a unique Mikimoto presentation box with certificate of authenticity.