Corals can be divided into shallow sea corals and deep sea corals. Shallow coral is also called reef-building coral, and the coral reef platform developed from it can greatly reduce the damage of natural disasters such as typhoon and storm surge to coastal ecology. Deep-sea corals are also called precious corals. Because its petrochemical process is completed in the deep sea, coral jade has small pores, high density and compact structure, and is the main raw material for various carved works of art and jewelry. Because red corals are the most precious among deep-sea corals, red corals can be divided into five categories according to their colors: deep red corals, pink corals, pink corals and white corals.

The materials used to sell coral ornaments in the general market are as follows ◎ Akaaka AKA (main place of origin: Japan, a small part of Taiwan Province Province) is translated from Japanese, originally meaning red, generally referring to red coral. ◎ Momo (main producing area: Taiwan Province Province) is translated from Japanese, which means peach or peach color, and generally refers to peach coral. PS and Momo have many colors, ranging from light red to red, some yellow and some orange. ◎ Deep-water materials (mainly produced in Midway Island in the Pacific Ocean), materials with pink spots on white background ◎ White corals with general white materials are collectively referred to as ◎ In addition, some people in the market call "baby noodles" light-colored momo. In fact, baby noodles used to refer to Akaka materials with very uniform powder and transparent texture, called angel skin. However, with people's increasing love for coral, there are different channels for its mining, processing and sales, so it is also called "Coral".