Nanyang pearls refer to pearls produced in Australia, Myanmar, the Philippines, Indonesia and Nanyang Islands. This kind of pearl is characterized by large particles, round shape, thick nacre, white color and strong pearl luster. Often called "silver beads", it is a world-famous variety and extremely expensive. However, there are few modern natural pearls, mostly cultured pearls. Because the shellfish used are larger and can accommodate larger pearl cores, larger pearls can be obtained, but rarely exceed 16mm. Nanyang pearl, located in the sea area with high seawater temperature, has a rapid nacre secretion and often forms a nacre of 1 every year, so the nacre is usually thick, but its luster is relatively poor, its surface is rough and it is easy to be flawed. There are many kinds of pearls in Beihai, which is a famous pearl town with a history of 1000 years. Moreover, colored pearls are recognized by the world, and many colored pearls are exported to other countries. So the price of Nanyang pearls you mentioned in Beihai should not be too high. The pearls in the North Sea are not inferior to those in the South Sea at all, and even surpass those in the South Sea. Jewelry stores rarely recycle pearls. I suggest you go to some pearl shops, which are opposite the seaside park.