Any cheering oil, preferrabley essential oils should be used, like lemon, orange helps with depression. I would Reiki the oils personally. Geranium is good for the logical side of the mind and helps for instance with studying so this might help her also to awaken this side of the brain verses using only the emotional side.
A clear crystal would help, nothing fancy and I would Reiki this also before I give it to her. No intentions, just hold it and energize the gifts.
Aroma oils smell good but have no healing properties unlike quality essential oils that do.
Look in a metaphysical type store or one might try a health food store. Some bed and bath type stores now carry decent essential oils.
I would also suggest to her to try to read, organize her closets or drawers as this seems to help one get their logical brain side working again. It worked for me in the past. It does not hurt to see a doctor also and get some therapy if needed.
Blessings,
Donna