PROBLEM TO BE SOLVED: To provide a cultured pearl shining in unconventional natural white pink, and formed via a production step of novel cultured pearls.SOLUTION: A cultured pearl including an outline layer showing a color tone of natural white pink based on pink quality held by coral can be formed, by applying: a preparation step including caging, removing bysuss (Ashiitonuki) and care and a step including nucleus insertion of a piece for cultivation and a nucleus of coral, succeeding care, treatment such as taking off the coast (Okidashi) or care, and finally harvesting (Hamaage).SELECTED DRAWING: Figure 3COPYRIGHT: (C)2017,JPO&INPIT【課題】新規な養殖真珠の製造工程を経て形成される従来にない自然なホワイトピンクに輝く養殖真珠を提供する。【解決手段】かご詰め、足抜き、手入れの準備工程、養殖用のピース及びサンゴの核の挿核、その後の養生、沖出し、手入れ等の処理、浜挙げにいたる工程を施すことでサンゴの保有するピンク質を基調とした自然なホワイトピンクの色調を呈する外郭層を備えた養殖真珠が形成できる。【選択図】図3
