Just use the same principles -- try to look mature and professional. No pink swatch watches (don't buy a new watch if that's all you have though, just don't wear one at all) or over-the-top jewelry. If you feel like you're trying to "get away with" something, it might not be appropriate. Shoes should be closed-toe and most importantly, comfortable. You don't want to be distracted by your huge blisters during your interview. This is a pretty comprehensive site if you're worried about figuring out what's appropriate:
http://chemistry.about.com/library/weekly/aa013102a.htm
Just to throw this out there, my personal accessorizing pet peeve is when people wear their class rings conspicuously and carry around portfolios embossed with their school name in gold on the front. Your interviewer has your application -- they know where you went to school.