Akoya Pearls Defined. Akoya pearls are bead-nucleated cultured pearls produced in the Pinctada fucata martensii and Pinctada fucata chemnitzii primarily in Japan, China, Vietnam, South Korea and Australia, with the majority of production (>95%) taking place in Japan.
Akoya pearls are the classic white saltwater pearls. They are known for extremely high luster and perfectly round shape. In size they are often seen in small pearls about the diameter of the eraser of a pencil, which is between 6 and 7mm.