abstract appearance background brown colored coloring colors coloured colouring colours contours contrast contrasts cracks fissures flaws grit gritty layered layers levels light lines natural ribbons rock rock-face rockface rocky rough rugged sandstone sandy shade shades of color shades of colour shadows shape shaped shapes stone strata stratum sunlight sunny sunshine surface surfaces texture textured textures veins wallpaper ancient backdrop block chaos chaotic color colour construction copy copyspace curve curves dressed erode eroded erosion face flat fossil geological geology gold grain grained grainy grunge grungy layer level limestone macro mason masonry material orange organic outcrop outcropping oxide patina pattern random rusty sand sediment sedimentary silica silicate silicon space stonemason striate striated striation striations swirl swirls uneven wall weathered weathering weirdvis yellow