Sometimes referred to as Black South Sea pearls, "Tahitian pearls" are cultured in areas stretching from the Cook Islands, eastward through Tahiti to the Tuamotu Archipelago and the Gambier Islands in French Polynesia. The colors produced vary widely from purple, green, black and shades from gray to cream and even white. The rarest and highly sought after color is peacock green - the greenish black color of a peacock feather.