Tahitian pearls are grown in the Pinctada margaritifera cumingi oyster species (also known as the Black Lipped Oyster) found throughout its native waters of French Polynesia. Only 1 in 10,000 of these oysters produces a pearl and because of this rarity, they cannot be mass produced. It takes 22 to 26 months for a pearl to grown and the size range from 8 – 18 millimeters (average size is 9-10mm), but there are some extremes. The largest Tahitian ever found was 25 millimeters! Tahitian pearl color includes peacock (the most popular), black/black, black/grey, silver/grey, black/rose, black/blue, black/green and aubergine (eggplant).