At present, pearls on the market are mostly divided into freshwater pearls and seawater pearls. Freshwater beads are mainly distributed in the middle and lower reaches of the Yangtze River, with almost no perfect circle, and are mainly divided into three colors: white, pink and purple. Its growth speed is fast, and it can grow from seedless to 7-8mm in 2 years. Seawater beads are distributed in Hainan, Japan, Tahiti, Nanyang and other regions, mostly round and full. Mainly in pure white, gold, malachite green and other colors. The growth rate of seawater beads is extremely slow, but because of this, their density is much higher than that of freshwater beads, which also makes seawater beads have better texture and luster. MIKIMOTO 18K Nanyang Golden Beads with Diamond Earrings There are four kinds of gems in colored gems, namely ruby, emerald and golden green cat's eye; In the pearl world, there are also three kings of seawater pearls: Australian White, Nanyang Golden Pearl and Tahiti Black Pearl. Among many seawater pearls, Nanyang Golden Pearl is the most expensive and the color is the most pleasing to the eye. It is one of the pearls with the most collection value, and it is also the royal pearl that high-end jewelry loves.