Types of flat rocks used for backyard landscaping include terracotta stones, flagstone and wallstone. Landscapers also use flat quartzite and mica stones for backyard walls, paths and steps.
Terracotta stones come in decorative flat rocks or in bricks. They complement tropical back yards, but they are less formal than the more expensive stones. Flagstones are larger flat rocks that landscapers and homeowners use all over backyards. They are most popular as stepping stones in paths and patios.
Wallstone is rock that quarries mine specifically for landscapers to use in retaining walls and other landscaping projects. Wallstone adds a more natural look to backyards and property boundaries, and is available in a variety of colors and sizes.