Natural Stone Resources TRVAUTLVS1224H-5MEWC 12" x 24" 5cm Autumn Leaves Honed Modern Edge Travertine Wall Cap. Natural Stone Resources is a premier importer & distributor of quality natural stones from around the world. Whether you're looking to add coping to your masonry walls, columns, landscape, steps, or pools, the Autumn Leaves Travertine Modern Wall Cap is a beautiful choice. Includes a modern edge on both 24" sides.