From: Tsukasas Kite at 2021-06-15 22:53:50
Can you please explain? I have a very nice but old Go set from like 2000. Are you saying the stones might be made of toxic materials?
If your stones are yunzi then they might contain lead. You should get a lead test kit to see if they contain above the allowable level of lead. If they do, you should replace them.