Natural Stone Resources TRVAUTLVS1624H-3MEPC 16" x 24" 3cm Autumn Leaves Honed Travertine Modern Edge Pool Coping. 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 Coping is a beautiful choice. This coping provides a smooth surface and acts as a great finishing accent.