abstract appearance background brown colored coloring colors coloured colouring colours conglomerate contours contrast contrasts cracks fissures flaws grit gritty layered layers levels light lines mica natural rock rock-face rockface rocky rough rugged shade shadows shape shapes silicate stone strata stratum sunlight sunny sunshine surfaces texture textured textures veins wallpaper shaped surface art artistic blended blue circles circular clock cobalt-blue color colorful colour colourful curved curves design details dots dotted electric-blue interconnected interlinked numerals patterns perspectives psychedelic-art purple Roman-numerals style thick thin time vibrant violet artwork coloration copper copper-work copperwork coppery crafted craftsmanship decoration decorative designed Designs distinctive embossed embossing impressions metallic mosaic panel paneling panelling presentation raised rectangles rectangular