but South Sea pearls and black Tahitian pearls can reach a diameter of around 15 or 16 millimeters. The larger size makes South Sea pearls and black pearls more valued. This strand of South Sea ...

The main factor that determines the color of pearls is the shade of the oyster shells. For instance, black-lipped oysters are ...

but South Sea pearls and black Tahitian pearls can reach a diameter of around 15 or 16 millimeters. The larger size makes South Sea pearls and black pearls the most valuable type of pearl.