Royal Imports Decorative River Stones for Garden Filled With Gravel | Home DecorRoyal Imports Decorative River Stones for Garden Filled With Gravel Home Decor NATURAL STONES These high quality natural stones by Royal imports are non toxic and eco friendly river rocks. Their natural attribute will make them last longer because they will not deteriorate like mulch does. Common applications include flowerbeds, groundcover, decorative concrete topping, or walkway paving. Decorative rocks are a permanent and cost effective alternative