this site is about geology. I collect rocks and minerals. If you want to start the hobby, there is a great place that sells rocks and minerals annually. But the other thing that you can do is search around and look. you can also go to mines (I find it to have more pleasure then to buy stuff). You want the rocks to be sicure, so try to get a metal box and a couple other littler boxes. Try to lable all of the rocks and crystals. You may event bother  to get some felt if you have some really nice stuff.