Suzzie sometimes therapists give their clients a little something to hold on to in between sessions. I cant speak for yours but mine did it because she thought it would help remind me of what we discussed in sessions, help remind me that I am not alone when I feel like Im all alone, and to be a way of self comforting me.. holding on to the smooth rock in one hand and the rough one in the other, noticing the two conflicting rocks can help ground me back in the present during times of stress when I tend to space off, not care or have intrusive thoughts...

like I said I cant speak to why your therapist wants you to have the rock. only she can answer that question for you... all we can do is tell you why our own treatment providers did the same for us.

suggestion... maybe you can contact your therapist, and maybe ask her why she wants you to have the rock right now. or if your treatment provider already explained why, maybe holding the rock will remind you of what she told you already for the reason why she wants you to have the rock.