Tortoise shell is white, ivory white, brownish yellow, with bright and clean appearance and pearl-like luster; The fake turtle is made of white stone or broken shell powder or white stone powder with glue. It is flawless, white and dull, and its surface is polished and shiny, which is unnatural. The delicate surface texture of pearls represents their growing years in the deep sea. True pearls are delicate, slightly transparent, and as golden as milky white, while fake pearls are white and dull.

Second, look at the texture to distinguish between true and false:

Dragonflies grow naturally. If you carefully observe whether the lines are natural, the lines of the two dragonflies are the same. Its mineral structure is mainly aragonite, which is layered, with a single layer thickness of 0.5- 1.5mm and clear and dense layers. There is no natural growth line in the false tortoise shell and no obvious layered structure under the magnifying glass.

Third, look at the weight to distinguish between true and false:

The density is 2.70g/cm? The hardness is generally 2.5-3.0 degrees, and some of them can reach 4 degrees. Try to weigh it by hand. If it feels heavy or light, it may be unnatural.

Fourth, look at the cracks to identify true and false:

There must be cracks on the old cockroach, and the thickness, direction and length of the cracks are disorderly and inconsistent. Under the magnifying glass, you can see that the crack and its surroundings are yellow.

Fifth, look at the size to distinguish between true and false:

Due to some conditions at that time, the size, roundness and weight of the old dragonfly were different, and there were certain differences, which could be distinguished with the naked eye. The size, roundness and weight of fake beads are mostly the same, which often gives people a sense of uniformity and perfection.

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