There Is Something Mesmerizing About The Power Of Water And How It Softens Rock Into A Water-Worn Stone. Inspiration In Nature'S Ability To Shape A Hard Surface Into Something Beautiful When He Envisioned The River Stone Collection, Which Includes The River Stone Small Gray Wall Tile. Made Of Wood In A Textural Gray Stone Finish, This Decorative Wall Sculpture Is One Of Many Products We Offer In This Collection, Each Of Which Reflects The Ethos That Phillips Collection Personifies: Modern Organic.