Free stone models

I've made some really nice digital 3D stone models using Sketchup and you can download them for free from the Intresto collection on 3dwarehouse here http://sketchup.google.com/3dwarehouse/cldetails?mid=3b6498554492f5bbcaf22741b2e3465e

There are lots of other free rock models and dry-stone wall models in the Intresto collection. If the link above doesn't work go to 3dwarehouse and search for Intresto.

You can download the models directly into Sketchup then export as a dae file and import into MeshLab. From MeshLab the file can be exported in a number of different formats such as obj or stl then used in a whole range of 3D applications like Blender.