Moonstone wallpaper collection Omexco by Arte. You can order wallpapers from the Moonstone collection from Omexco online with us! An exuberant collection of textured wallpaper that looks as soft as iridescent moonstone. Wallpaper designs Stardust, Stepping Stone, Pebbles, Morning Dew, Memoirs, Cadence and The Muralist. Wallpaper Moontstone Omexco by Arte.