So, I have a few specific rocks/stones/minerals that I am looking for. I have a specific look that I want to attain in my 10g, and I have found several minerals I want to use that are considered aquarium safe. I just don't know where to buy them. They are a bit on the fancier side....(like quartz)....so when I look them up online, all I get is either big, collectible pieces or jewelry. I want some rough, natural pieces. Any ideas for places online?