Rubble Stone Landscaping Rock is a medium sized, angular natural stone anywhere between 4in and 12in in size. Rubble stone is great for natural stone accents in landscape design, creating natural stone walls, filling fire pits, or even adding to aquariums and terrariumns. Rubble Stone Landscape Rock - RCP Block & Brick Please note: You are currently browsing img rock landscaping ideas for stunning outdoor areas that is 800x600px in size. This image is listed in lava rock landscaping ideas category. Rubble Stone Landscape Rock RCP Block Brick, 800x600 in 172.84 KB.