An curved arrow pointing right. South Sea pearls are the largest cultured-pearl variety, sometimes reaching over 20 millimeters in diameter. The Pinctada maxima oyster can take up to five years to ...
This triggers the oyster's defense response ... Akoya pearls can only grow to about 9 or 10 millimeters in diameter, but South Sea pearls and black Tahitian pearls can reach a diameter of around ...