Woah did you steal them from a museum or something they are actually quite nice. I used to collect rocks stones and flints as well! Some of them were really nice, I smashed a flint apart a few months back and it was really white and amazing ...
You guys should see my Yu-Gi-Oh collection. I can't take a picture but I have two binders with like 300 pages and each page can hold 9 cards, and I basically have every slot for all pages filled. Then I have 2 shoe boxes that are filled to the top with Yu-Gi-Oh cards.