Stoneline Group SL32-D-B-219-30-65 16" x 24" x 2" Fantastic Royal Tumbled Coping. The Fantastic Royal marble is one of the most desirable materials out there, it’s after all a natural stone, which makes it a work of art created by the earth itself. This natural marble from the quarries of Turkey is versatile and sophisticated enough to be used in interior decor and hardy enough for exterior spaces. Other advantages of marble are the natural and earthy appearance and insulation from weather and noise.