The edge lines of counterfeit coins are never that strong. So how do you tell the authenticity of a silver coin from the strength of its edges? First, it is a real coin; no matter what shape the edge

The edge lines of counterfeit coins are never that strong. So how do you tell the authenticity of a silver coin from the strength of its edges? First, it is a real coin; no matter what shape the edge teeth are, first of all, they have high density and rigorous structure. When viewed with a 100x magnifying glass, under the action of light, the back of the teeth reflects light. Due to the high density, the bright spots are small and concentrated. The grooves have mechanical scratches, the tooth walls are firmly pushed, the tooth grooves are shallow in and out, and the middle is concave. The width of the teeth is generally uneven, and except for the Beiya teeth, the spaces between the teeth are mostly in the shape of jujube pits. The second is sand-finished coins; when viewed with a 100x magnifying glass, the metal molecules on the edge teeth appear to be loose with blisters, non-reflective, blocked teeth, and weak tooth walls. Some sand-finished coins also have small intermittent lines on the tooth grooves and backs of the teeth. But this kind of thread is extruded and formed without any feeling of cutting scratches. The third is a modern new high-imitation machine-made coin. Use a 100x magnifying glass to see that due to insufficient pressure and poor tightness between metal molecules, the back of the teeth has flocculent undulations. It also reflects light under the light of the magnifying glass, but this light It is astigmatism, the bright spots are large but not concentrated, the tooth wall has no strength, the width and narrowness of the edge teeth are roughly the same, and there are no cutting scratches. Conclusion: Everything has its own laws. Only by grasping the fundamentals, seeing the essence through phenomena, and treating this phenomenon as a guide to get started can this be a reliable scientific method. To sum it up in one sentence: Understanding begins with practice. Only by raising perceptual understanding to the level of rationality can we make a leap in the process of distinguishing between true and false.