Proline Decorative Concrete Systems 3OG 36" x 36" Seamless Old Granite Cleft Stone Concrete Stamp. It started an entire industry of seamless texture skins. Seamless textures are preferred by contractors and homeowners because they are easy to apply, can be done in less time than pattern concrete, allows for a clean look with less grout lines and produces a long lasting beautiful addition to your home. Granite is a plutonic rock of the Earths crust, formed by the cooling of magma into a lovely textured stone. Developed from real rock, Prolines Seamless Old Granite Cleft Stone resembles the natural stone adding the benefit of lower cost, higher durability and inherent strength and endurance. Old Granite Cleft Stone has a signature vein that sets it apart from all others. A perfect accent to driveways, patios, walkways, kitchen counter-tops and interior floors - this pattern will surely leave a lasting impression.