If I keep pebbles/ stones in my pocket & touch them when i feel the need to pick my skin will it help?

Like distract/ soothe me into not touching My skin cos the smooth cool texture of the stones would be distracting and calming? I have a very bad Obsession with picking. touching/ pulling scabs/ acne off my face and its destroying my life. Also, what kind of stones do you suggest, preferably small ones i can keep in my Pocket so i can take them with me