I like the textures of stones and rocks not just for designs, but for their own sake. Weathered and aged, the surfaces often turn into very interesting colors. So here´s another set of free stock images; I may prepare an additional one dedicated to stone wall textures in the near future:
As a side note, from a photography point of view not many subject matters are as demanding on the equipment, esp. lens resolution and image processing techniques, as finely textured stone surfaces. They make excellent starting points for designs though (and good dark backgrounds, too).
I posted some grunge textures a few days ago, if you are still looking for more, you may want to download the following:
Well, this one is an example of how colorful a weathered stone can become:
Another colorful closeup photo:
If you are into rust metal textures, you may like this one (it is stone):
And the last photo for today (remember, in order to download the stock images, you have to click the low res pix):