No, but I am not big on such things even from people I am fond of. Mostly I don't know what to do with such things - I put them on shelf and they get dusty or in my pocket and they would get misplaced or something. And I don't really find the woman reassuring in any sense or connectable- so an object reminding me of her, even if did so and I did not forget why I had a rock or something, would not be useful for me.
Having said that - from what I have read by those guys - some seem to find it quite usual and helpful for the person in therapy.