 Freshwater keshi pearls from China are for the most part unquestionably cultivated, but in an indirect way.Active mantle tissue grafts in a mussel's mantle are needed in order for the first harvest of pearls (pearls "not" considered keshi by most Chinese dealers) to grow.Except for the insertion of nuclei in selected pearl sacs to make coin pearls and bead-nucleated "flame" pearls, keshi pearls will grow without any further intervention following the careful harvesting of the first round of pearls.