Tahitian pearls come from French Polynesian islands and Micronesian Islands. They are cultured from large Black-Lipped Oyster, or Pinctada margaritifera which is the only oyster to produce naturally black pearls. Unlike other types of pearls, Tahitian pearls have naturally black body color with full spectrum of overtone colors. Tahitian pearls are bead-nucleated with very thick nacre (minimum 0.8 mm).
The most common size of Tahitian pearls is in the range of 9 mm to 13 mm with round to baroque shape. Some can be up to 20 mm in size. Tahitian pearl is the only type of pearls that has full spectrum of colors. Vast colors make matching these pearls an difficult task. Tahitian pearls were once the most valuable cultured pearls in the world. Today it is more affordable but still expensive. Tahitian pearl is only second to South Sea pearl in both size and value.