What do you guys do with your rocks?

I have quite a few I've collected through my degree and don't know what to do with them!

Might put some pictures up if people are interested although not sure I have much interesting apart from a rock choc full of ammonites (IIRC -haven't looked at it in a while).

[Pictures!] (http://imgur.com/a/mlRhb) I apologise for the crappy quality (my nice camera is back at uni so had to use my phone) and the lack of scale (my brain is half asleep and distracted by other things). Let me know if you want a better picture of a particular rock or more info about one (if I can remember it!) If you want a picture I'll do it tomorrow as I need to go to sleep...!