What species must be distinguished first, Aka, Sardinia, DOG and Sham Shui Po? The same quality, the price decreases in turn, and then it depends on the color, weight or diameter. The redder the color, the more expensive the diameter. Prices range from several hundred yuan to several thousand yuan. If the diameter exceeds 10MM, Aka is not considered. A bead costs thousands, and if it is the deepest red, it costs tens of thousands. But many businesses sell dyed corals, which are usually dyed with white corals, which is the so-called "natural corals". It is true that white coral is natural, but it is not red coral after all, and its color is dyed. The real price is only tens of yuan. Appraisal certificate is of little use. The certificate won't tell you what kind it is, only whether it is natural or not. Appraisal institutions should not believe it, and some even have certificates for dyeing white corals. Because this is also "natural". It is said that red coral was discovered in Taiwan Province Province in 1989.