Is it still ok?

So my cousin and I got into a little heated debate today. Here it goes. We are both christians. However. My cousin is really into reiki and crystal healing and auras and all that jazz. I don't have a lot of knowledge on it. But, from what i have what iv been told is, that kinda stuff auras and zodiacs etc. is not something that is involved in the christian culture. I am not a judgmental person "to each his own" my mottos goes but Shes says there is nothing wrong and of course out debate began when i started to mention to her that i thought the two did not mix together again due to our religion. So i got to thinking and really wanted to get some concrete answers. I have yet to speak to a pastor or anyone of the church about this so I figured for now id get advice or comments from the community.