Brunnings Volcanic Decorative Landscape Stone is ideal for a range of uses for the home, garden and building site. Brunnings Volcanic Decorative Landscape Stone has several useful characteristics for a variety of landscaping and construction applications for garden beds as mulch, bottom drainage layer in pots and planter boxes, lightweight drainage material behind retaining walls, high temperature insulation and as a bedding media for underground pipes. It is somewhat porous, has high surface area and high strength to weight ratio. It is also perfect for use in BBQ areas and decorating garden beds.