backgrounds brown colors colours cream edge edges folds layers mollusc mollusk pearly pitted ridge ridges rim rough seashells shape shapes shell shells Sizes smooth spiral spiraling spiralling surface texture textured textures turns twists types variety white backdrop background bar blue bright brilliant color colored colorful colour coloured colourful construction glare gleam glow glowing irregular light metal metallic plate reflections regular shine shining shiny steel structure structures orange silver abstract appearance coloring colouring contours contrast contrasts cracks fissures flaws grit gritty layered levels lines natural ribbons rock rock-face rockface rocky rugged sandstone sandy shade shades of color shades of colour shadows shaped stone strata stratum sunlight sunny sunshine surfaces veins wallpaper