Tumbled Lepidolite (price is for one, intuitively chosen).

Eases depression, mood swings, stress & anxiety. Brings peace, optimism, patience & self-love. Helps overcome obsessive thoughts & addictions. Contains Lithium. 

Every stone does more than is listed here. The best way to choose is to use your intuition. Just because someone says a stone does or doesn't do something, doesn't make it true for you. I encourage you to use them as you feel called.