A female I work with is having a graduation party today and me and a couple others from my dept got invited. I'm having problems deciding on what to get her as a gift. Would it be bad to just get her a card with $40 cash? I thought about gift cards/certificates but what if she doesn't like the store.

Keep in mind:
-I've known her for a year
-She just bought a house, it's being built now
-She is leaving our company in September to become a Nurse, thats what her degree is in