?Keshi? means ?poppy seeds? in Japanese. These pearls are an accidental by-product of the culturing process. The seeding or the nucleation process very often sparks off a response in the mussel or oyster, so in addition to the cultured pearls that are intended, the mussel or oyster also produces ?Keshi Pearls? which are not unlike natural pearls. KeshiPearls, like natural pearls rarely round but it is the irregularity in shape that makes them beautiful and fascinating.