This facility can convert silica pearls into black pearls. However, black pearls are more valuable and require a greater quantity of silica pearls. It is also possible to convert black pearls back into silica pearls.
ShirikaShinju Wo KuroShinju ni henkann dekiru. tadashi, kurosinju no houga kati ga takaku, yori o-kuno SirikaShinju wo hituyou to suru. KuroShinju kara ShirikaShinju nimo dekiru.