1. Red Coral: The famous producing areas are Algeria, Tunisia, Spanish coast, Keelung and Penghu Islands in Taiwan Province Province, Italian and French Bay of Biscay. Red coral is one of the most common and important coral species, with rich colors, such as crimson, pink and pink. Among them, deep red is often called bovine blood red, and pink is called angel hair or baby face.
2. White coral: White coral is also a common variety, with milky white, gray white and porcelain white colors. Because of its low price, white coral is generally used to make bonsai or ornaments. Some white corals are artificially dyed to imitate red corals. China Nanhai, Penghu and Sulphur Ball are the main producing areas of white corals.
3. Blue Coral: Light blue and blue are relatively rare species. Mainly distributed in the Atlantic and Mediterranean.
4. Golden Coral: Golden Coral is golden yellow and tan. The surface has a unique papular appearance, and some surfaces are smooth, which can appear halo under strong oblique illumination.
5. Black Coral: It is found in the central Red Sea, Australia and the South China Sea of China. The composition of black coral is almost entirely composed of keratin, showing a gray-black and black appearance, extremely tough, and a shrinking tree structure can be seen on the cross section. The advantage of black coral is that it is artificially bleached and dyed to pretend to be golden coral.