Akoya pearls are from two to ten millimeters in size Replica Ulysse Nardin watches, and their shape is typically round or off-round. Colors range from pink to white and yellow. Typically pearls are harvested after about eighteen months to three years of cultivation, reaching about 0.5 mm in diameter after eighteen months in the host oyster. Akoya pearls are renowned for their high luster and rich color. Tahitian Black PearlsTahitian Black pearls are cultivated from Pinctada Margaritifera oysters (black lip oysters) found in French Polynesian waters Replica Ulysse Nardin watches. Black South Sea pearls come in a wide range of colors from silver / gray, blue, and red / eggplant to dark green, with peacock being the most valuable. Cultivation time averages about two years. Tahitian pearls have long been highly prized by many cultures for their exotic colors and brilliant luster.To read about what do jaguars eat, what do seagulls eat and other information.