Spud,
here are two variants of your stone texture, based on photos of the rocks in Sicily/Southern Italy and the Western Desert.
To my eyes, they look a bit more authentic, although the texture you used for your first model looks to be a good match for Sicily/Italy. The Sicilian/Southern Italian texture is tilted a bit more towards yellow and is color checked against period color photos of damaged stone buildings. I'll let Gitano be the final judge, though! The North African texture is totally blown out towards yellow so it looks like sandstone and also has the contrast sharpened to give more of a sense of harsh desert light. It represents a compromise between the various rock and sand types found in the region.
Feel free to use or alter them as you see fit.
http://forum.1cpublishing.eu/attachm...1&d=1455599299
http://forum.1cpublishing.eu/attachm...1&d=1455599299