This is one of over 4720 effects generated by Filter Forge, a Photoshop plugin that allows you to create your own filters.
To open this filter, you must have Filter Forge 2.0 or higher installed on your computer. If you don't have it installed yet, click here to download Filter Forge
If you were to etch your image into stone, then leave it to nature for a few decades, it might look something like this.
stone rock etch carve lichen moss mold ancient old statue
This filter has earned its author one of our rewards. They are given to the authors of popular filters and include a free copy of Filter Forge.