abstract appearance blue-metal chips close-up concrete embedded granite gravel gray grey heavy near patterns pebbles protective rocks rough secure shaped shapes size Sizes slab slabs solid stones strength strong surface surfaces texture textured textures thick wall angles background brick bricks building-blocks cave-like caves colors colours cracks cream firm grains grainy grit holes holey ingredients perspectives selected selection singles variations variety walls arch arched arched windows architectural architecture Australian block building dark design elements exterior external height heritage high historic historical history masonry old ornamental ornamentation plain Rooms Somber sombre stonework windows backdrop brown color colored colorful colour coloured colourful form irregular marble mason Mineral minerals multicolored multicoloured natural nature ore pattern patterning red rock stone stonecutter stonemason structure structures wallpaper blotchy blue specked angle basic brick-wall perspective smooth standard uneven variation varied various backgrounds barrier blocks coloring colouring constructed foundation foundational growth plants security well-built