The resin walnut is characterized by reddish cortex, but it does not hang porcelain after a period of time.
If it is a new walnut, it is generally not deceived, because there are white roots in the tendons of the new walnut, which will take some time to disappear. Resin walnut tendons would not have this kind of white stubble.
If you buy walnuts for a while, the focus is on the navel (asshole) of walnuts. The navel of resin walnut is plugged with sawdust or sealed with wax. Be careful in this situation. Ask him when the walnuts were planted and sealed. Generally, walnuts planted for more than two years can be hollowed out and sealed, otherwise they will rot.
Another point is that resin walnuts are generally very Ruta. Just remember that walnuts are naturally formed and have no flaws. It's too rare, and matching is even more expensive.