1, texture: If the walnut is really new, it has a strong wood texture. If you look closely, the walnut skin will have a wood-like texture (not the concave-convex texture of the walnut itself), while the pink walnut does not have that wood texture. 2, feel: real walnuts, even if they are new, feel smoother when rubbed (except hazelnuts and lanterns, but these two varieties are relatively cheap and there are few fakes), and pink walnuts feel particularly good. 3, weight: if it is a new walnut, it is heavier, and the old walnut should be lighter, because the water has evaporated. If your hand feels like two big stones, it's basically resin. 4, color: old walnuts are not necessarily red, some are not red, but the real old walnut color must be deep and natural, so that you feel the same color from the inside out, like a carved jade, you can see the thorough luster inside; Fake walnuts and dyed walnuts feel opaque and translucent. 5. Glossy: The old walnut has a thick patina, and the luster is elegant and dark, similar to the feeling of mahogany furniture. The fake walnut has a dazzling luster and feels like plastic, resin and glass. 6. Common sense: The most important common sense is that there are no two identical leaves in the world. Similarly, there are no two perfect walnuts. If you find that their lines and sizes are exactly the same (or extremely similar), and their shapes are particularly perfect and round, then be careful. The probability of being noticed by a scholar is very small. To put it bluntly, it is to put a correct attitude, not to be greedy for perfection, and not to expect to find out.