dusty and dirty gray stones and sand pattern

abstract aggregate backdrop background ballast boulder boulders broken chippings close closeup coarse cracked crushed crusher dark dirt dust dusty formless fragment fragments graded granite gravel gray grey grit heap heavy irregular light little loose macadam mine mineral monotone natural path pattern pebble pebbles pile piled pit quarry raw refracted rock rocks rough round rubble sand sandstone seamless shade shades shape shapes shingle size sizes small stack stacked stone stonepit stones structure structured surface texture textured unformed wallpaper