feed back check out the old rock thread:https://polycount.com/discussion/125857/rawk-post-any-rocks-you-make-here/p22https://www.youtube.com/watch?v=Z7m_4eDicJI https://www.youtube.com/watch?v=lam2GWZ6KTM
They could be good enough or need a lot of refining depending how they look in the final scene. I get more bone vibes than rock, but that can work too. I'd suggest blocking out the scene with how you want to use the rock and proceeding from there.
what level of detail are you aiming for? if this is for a tiny diorama, the rocks are fine, but if they're for first/3rd person level of detail, you'll want to look into modular level design