A carved rock I found at my Grandparent's house. Scanned with 123D Catch.

Scanned with 123D Catch, remeshed in Blender.
rock.blend is the rock w/ textures

Capture_2015_09_03_22_23_46asdfa~.obj and the corresponding mtl file is the raw data from 123D Catch.

rock_remesh2_fixed.stl is what I'd recommend for printing. It's been remeshed in blender then passed through Netfabb Cloud.