15 Brushes to sculpt rocks in Blender.
This is not an add-on, but brushes that you append to your Blend file. More detailed instructions in files.
Hope you enjoy!
Find my other two packs here:
If you do not wish to donate, just enter zero under "Name a Fair Price".
[Update] Issue with brush previews have been fixed. Refer to the *.md file inside the zip for more information.