Wow, the cave is really big. With the crystals, it's hard to know what type of instrument that is used to remove one of them. The next location has a rock in it. So I thought that picking up a rock would help with smashing the crystal. Maybe add a response for tools that can't be used if you try to smash rock?
I guess I don't have everything I need, but it's hard to know if I don't have the right item or if I'm just using the wrong command.