I’d wait until she mentions something similar again, then take the opportunity to tell her you are a Christian and share the good news with her.

It can be difficult, I know people who have gotten in to this kind of stuff. Especially now days, the whole crystal fad has really taken off where I live. I have friends who carry around overpriced rocks in their pockets because they supposedly do something astounding. Then they put them out under a full moon to recharge.

I have a friend who is very insistent she is the only one to touch her crystal collection, because other peoples bad vibes get in them. I once found myself alone in the same room as her collection so I touched every single one of them.