Ryan was looking for a fresh, new idea of landscape around the house and went with Rainbow Cobble. A blend of 4-8″ rock, Rainbow Cobble has small to medium-sized boulders, a smooth and round appearance, and a mixture of tan, red, and grey hues. Rainbow Cobble is great for accent boulders in landscape, water features, and rock walls. It also matches our 2-4″ and 2″ Rainbow Cobble.