You can get many textures and looks by using glazes or waxes, they give the sculpture a natural and pleasing look and feel

waxed red earthenware	streaked grey earthenware	glazed earthenware	waxed earthenware	waxed earthenware	glazed and tinted earthenware
porcelain soaked in tea	earthenware covered in silk paper	earthenware tinted with broux de noix	glazed and waxed earthenware	glazed and waxed earthenware	tinted earthenware
waxed earthenware	tinted earthenware	sandstone with a potato flour patina	glazed and waxed earthenware	tinted earthenware	painted porcelain covered in paper