Proline Decorative Concrete Systems RS170A 34" x 36" Sedona Stone Concrete Stamp. One of our Random Stone collection, Prolines Sedona Stone is a randomly placed stone pattern. This is a two-part system, as each piece is slightly varied for a more random look to the pattern. Light Sandstone adorns the background and the edges of these stones are roughly chiseled. If you love the look of natural stone but want the low cost and durability of concrete, then consider this piece as an addition to your home or business.