First paint a solid color onto the rocks. After the paint is dry add some patterns with a small brush.
To protect the paint from getting scratched and to add a nice finish, add a layer of Mod Podge after the paint has fully dried.
Take your wire and wrap it a few times around a pen or marker.
Straighten out the rest of the wire underneath the loops that you’ve just created. Wrap the wire around the rock a few times.
And that’s it! You can easily stick photos in between the wire loops to hold them upright.