While North America set a new standard for large freshwater pearls, white saltwater pearls from the coasts of Panama and Venezuela competed with pearls from Bahrain, and black saltwater pearls ...

Quite soon after their initial success with cultured saltwater pearls, Japanese pearl farmers experimented with freshwater mussels in Lake Biwa, a large lake near Kyoto. Initial commercial ...

Both saltwater and freshwater pearls are assessed based on lustre, nacre thickness, shape, surface quality, size, and colour. Pearls can be white, black, grey, red, blue, or green, with black ...