You see, when a cave collapses it is always a bad thing, right? But you could learn something from that and here is where the curiosity comes in. To obtain this curiosity you would need to chip that rumble (if you suvived the collapse, of course hehehe) and from that chipping you would abtain mostly rock ( the same type of rock of the surroundings), maybe soil (from grinded rock or even from the soil above if we are talking about the very first level of a cave) and a small chance to get the curiosity itself. This curiosity would be a cracked rock (your character have found why this tile collapsed and now can learn something from that) and it's quality would be based on Masonry. The name for this item is up for the developers as they can come up with something cleverer than I can

With this addition, you could clean up the mess from a cave-in AND obtain something cool to ramp up you character. And even better, all RP-friendly!
What you guys think?