Here's a little stone cottage. I started with a base coat of medium grey, then drybrushed some lighter grey over the stones, and finished off with drybrushing a hint of copper atop the stone. The roof, of course, is brown. I finished the model with a sepia-tinted ink wash. Overall I think this looks pretty decent, though I'm not sure my experiment with copper really paid off. Maybe a shade of white or bone would have been better; or, going in the opposite direction, black.