There is an unmarked stone tablet under the homestead. Is it good for Feng Shui?

We should check what kind of monument it is for. If it is a "wordless monument" in the layout of graves, temples and geomantic omen, it is of course unlucky; It doesn't matter if it's an abandoned tablet blank. I really don't know what that monument is, so for the sake of safety, I made a "V (except ominous)" gift and sent it away.