I was once in a museum gift shop scoping out the hot merch when I came across some of the rocks for sale. Yes, they sell rocks at the gift shop there. You can go to a store and buy rocks, the things that naturally occurs in the Earth. It felt ridiculous to me. Then I saw the prices and it felt even more ridiculous. They wanted more than one hundred dollars for some of those rocks, which felt completely ridiculous. Then I got educated.
Consider this picture to help me make my point. That's a pretty amazing rock structure. A rock structure like that doesn't just happen. It takes hundreds if not thousands of years. That was once a piece of flat earth that slowly became a huge, towering spire. That's why you pay $100 for a rock.