Can I take the olive stone out of the door? The local weather is similar to Langfang, Hebei. What conditions do you need if you can take it out?

Olive stones are not as fragile as you think. Many people say, you can't get wet. Yes, if you accidentally get wet, just dry it in time. But that is not the point. The point is the wind. You said that there is little difference in air humidity, and the most important thing to avoid after this factor is watching the wind. Cracking is easier when it is windy than when it rains.