Historically, natural black pearls have been one of the rarest and most exotic of gem materials. In the 1960s, however, a black-pearl culturing industry was initiated. Today, cultured black pearls play a prominent role throughout the international jewelry community. This article reviews the history of Polynesian blaclz pearls, the development of culturing and the techniques involved, grading, treatments and identification, and the factors responsible for their growing popularity in the 1980s.
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