what type of rock is river rock in landscape
River rock also has many landscaping uses. In fact, it's so versatile that we have created a seperate article all about this particular item: River Rock Landscaping Uses. Rainbow rock. As we continue up the size scale, we come to rainbow rock. As with most other types of landscaping rock and stone, this item goes by many different names. It's larger than the types of stone we've discussed above, but smaller than boulders. Rainbow rock can be used to form a border around a garden or other landscape features, or it could be used as a ground cover.