Only thing with picking the rocks out of nature is I live on the niagra escartment I have two choices in rocks, shale or granite. I'm looking for stuff with a little more charector. I bought some pagoda stone from my work (work in a BA fishroom), but I'v read that that stuff carries ALOT of iron in it and rusts in the tank, not something im comfortable with really, and so the search is on.
You really have to be careful what kind of rocks that you get too because of any leaching of something inside that you aren't aware of. If you don't mind paying a bit, Aquaforest Aquarium has some on their website that are nice. You do have to consider the cost because of the weight of rocks and all. Here is the site... http://www.adana-usa.com/index.php?m...uct&cPath=7_14
I am really fighting to purchase some of these for myself as well. They have some character!!