|Summary of Pearl Types
||Ocean salt waters of Japan and China
||Lakes and rivers, mostly in China
||Named after one of the tropical French Polynesian Islands, Tahiti
||The South Sea, including the Indian Ocean around Australia, Southern Indonesia, and the Southern Philippines
||Pinctada Fucata Martensii
||Margaritifera margaritifera. The most common species may live up to 15 years.
||Pinctada Margaritifera oyster can live 30 years.
||Pinctada Maxima is the largest and rarest pearl oyster in the world.
||4 to 5 inches
||Approximately 8 inches wide by 12 inches long
||Grows up to 12 inches, and weighs up to 11 pounds
||Sometimes found in excess of 12 inches in diameter
|Number of Pearls per Oyster
||One pearl per oyster except in the smaller sizes; under 5mm they can produce two pearls in one oyster.
||Can tolerate nucleation once because of its small size; however, can yield as many as 35 to 40 nuclei from one shell, depending on the size of the shell.
||About 20 percent of the oysters can be nucleated a second time.
||Can be nucleated up to four times, each time yielding a larger pearl, but the quality may decline. Can take a large bead and produce the largest pearl.
|Growing Time (cultivating to harvest)
||2 to 3 years depending upon the producer and the conditions
||8 to 10 months
|Size of Pearls
||5mm to 8mm
||2mm to 13mm
||8mm to 14mm
||9mm to 20mm
||Almost 100% nacre
||4mm to 6mm
||4mm to 6mm