The rock (I guess it's a rock) on the walkway between Pinkie and the Old Man, gives off a purple swirly thing when you touch it. How do I break it?
The black rocks that hurt you when you touch them; are these the same or is something else needed to break them?
White rocks; 1st one you encounter is in the desert next to the water, then in the snowy place.
What do I need to break these and where can I find these items?