Just my 2 cents-

This would hurt my feelings quite a bit...especially since she has accepted other gifts. I also don't see how a small crystal in a window (behind the blinds) is going to give off a weird and/or spiritual vibe to other clients. That is a little far-fetched. My T has all sorts of weird stuff in her office. I just assume that most of it came from other clients as gifts. I'm not really a crystal person either, but a few small crystals in a window would definitely not cause me to question my T's theoretical orientation.

Of course, at the end of the day, it's her office and she can do what she wants in there. However, if she's going to be so careful of other clients' feelings and perceptions around crystals- then she should be equally as careful with her gifting (feelings around accepting/rejecting) when it comes to you!