Kong is a kind of pearl produced in the conch of Dafeng snail, also known as "Conch Pearl" or "Phoenix Pearl". Its color is between pink and red, which is easily confused with coral, but if we carefully observe the surface of Konjuk, it has a unique flame-like luster. The quality determines the collection value of Konjuk. First of all, look at the shape, that is, whether the overall shape is regular. Secondly, see if there are any flame patterns, or if the flame patterns are beautiful. Again, see if the color is even. The probability that Taihō snails contain a hole-shaped chocolate is only one in ten thousand, and only110 hole-shaped chocolate can reach the gem level. Therefore, Konjuk has a high collection value and is a kind of pearl favored by collectors.