Not everyone who believes that a stone is healing power believes that they are ontologically basic.
But she is actually treating healing as an ontologically basic concept, even if she doesn't understand that she is doing so. That's enough.
She thinks it's possible for a stone to heal and do nothing else. It's not possible, unless the stone contains an intelligence that can determine whether a physical change made by the stone is "healing". It's every bit as absurd as having an acid that only dissolves shirts.
In practice she might tell you: "Duh, of course I check with a trustworthy spirit whether the stone is right for the particular occasion."
Does she believe that the stone causes harm if used in a way that doesn't match the judgment of the spirit?
She thinks it's possible for a stone to heal and do nothing else.
She likely doesn't. It's something you project into her without good reason.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.