The so-called wheel lines of natural turtle products can only be seen by observing the whole turtle shell, but as beads, no lines can be seen at all. You can see the lines inside by looking with a flashlight. Only by pressing powder can we let everyone see the wheel lines on the beads with the technology. The result of constant speculation by merchants is social misinformation, but everyone believes that truth is the criterion and the truth is upside down.

Second, look at the traces of mines.

Natural dragonflies are not beautiful in appearance and have many defects. The key is that it is easy to crack or produce uneven surface after long use. This is the result of natural weathering of shells after the death of living things, and it is not easy to happen because there is gum in the cockroach. Of course, there are perfect ones, but the price is more expensive. If you come across a perfect one with a low price, please identify it carefully. Artificial dragonflies are powder-pressed dragonflies, which are made by imitating the characteristics of dragonflies and using special techniques. The output is not large, but it is realistic and has few defects. Generally, they are sold to big brand jewelry institutions, with high prices and good quality.

Third, look at the color.

There are white, ivory, transparent materials and brown, and of course there are rare purple, pink, purplish red and even rarer blood dragonflies. Dragonflies have a bright appearance and a pearl-like surface; The fake turtle is made of white stone or broken shell powder or white stone powder with glue, which is flawless, dark and white, polished and shiny and unnatural.

Fourth, look at the proportion.

Generally speaking, natural Polygonum hydropiper has a certain proportion, the density is 2.70g/cm3, the hardness is generally 2.5-3 degrees, and some varieties can reach 4 degrees. In addition to observing whether the cockroach's texture is natural, you can also try to mourn its weight with your hands. If it feels light, it may be unnatural.