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Cultured pearls: what they are and how they're made
A cultured pearl is a pearl that is formed inside a living oyster with the help of human intervention. The process of culturing pearls was developed in Japan in the early 1900s, and it is now the primary way that pearls are produced.To culture a pearl, a small bead (called a nucleus) is inserted into the oyster. The oyster then coats the nucleus with...