Good for: I don't know any girl with pierced ears who would say no to a pair of earrings.
Not for: Girls who don't have pierced ears, obviously--unless you buy clip-ons.
What to go for: Earrings are great because there are options at every price range. You can buy an inexpensive pair for a female coworker or--boyfriends, take note--splurge on something beautiful for the special gal in your life.
Jeweled clip earrings (Forever 21), $4.80
Bee 23 by Bing Bang Bow Locket Earrings (Urban Outfitters), $28
Soda dot earrings (Blue Ruby), $80