After the patina is jade, it is more intense. When a pair of bones collide, they make a sound like the sound of a stone. Because the old walnut kernel has dried into skin, it has almost no weight when shaking, while the artificial walnut has a sense of weight when shaking.

At present, most of the fakes in the market are resin mold inversion. In order to save trouble, merchants often use a real walnut as the mold. The walnuts produced by mold inversion are not only the same size, but also the same grain. This is impossible. Pairs of walnuts are hard to find, and Wan Li can't pick one exactly.

Extended data:

In order to fake, the plastic imitation walnut has to be added with dye, and the smell of large pieces of plastic is pungent, just like the smell of newly decorated paint. Real walnuts don't smell like paint. If you use fire, the fire will be accompanied by a pungent plastic smell.

There are also popular styles of wenwan walnuts. Some varieties appeared after 2005, such as knives and white lion heads. If it is claimed to be a century-old product, it is obviously cheat people.