Art Deco Inspired Industrial Reclaimed Recycled Metal Keys Chandelier (I like this more every each time I see it! BTW: I'm pretty sure we have a stockpile of old keys, although you could use almost anything)
I really like this idea for an office or a library. Convert an old globe into a pendant light! Seems easy enough. Buy a lamp kit at your local hardware store, take apart a globe and drill a larger hole for the light. Put remainder of light together.