Proline Decorative Concrete Systems MD7404 4' Diameter Lotus Medallion Concrete Stamp. The Lotus Flower is an symbol traced back to ancient Egypt. It denotes the sun, as a symbol of creation and rebirth. This 4ft. Diameter Medallion will make a lovely accent piece to any home, patio or driveway. Try our new water based acrylic stains for easy coloring. Comprised of a combination of Limestone, Quartzite and Roman Slate textures.