Landscaping stone is a versatile material used in everything from building patios to creating a retaining wall. The stones can also be used for ornamental purposes. Landscaping stone is usually categorized by purpose rather than material, as there is such a wide range of materials. Most landscape stone is composed of sandstone, granite or limestone. Lava rocks, marble and river rocks are also often used.
Flagstones are usually large, flat pieces of stone that are used to build patios, walkways, and sometimes walls. Flagstone can be made of limestone, granite or sandstone. Pieces of flagstone can either be irregularly shaped (with a "broken" look) or they can be cut to fit together smoothly.
Natural stones are a budget-friendly way to add interest to you yard. In some cases, you can simply dig up your own, or ask a friend who has unwanted rocks on his property. Small stones can be used to edge a garden area or line a pathway. Pebbles are used to fill in pathways or around plants. Large boulders should be used as a focal point, according to Plant-Care.com.
Wallstone is just what is sounds like: Stones used to build walls. Smaller than flagstone, they are often shaped like bricks, but with roughly-textured, irregular edges. They are also used to build stairs.
Outcropping stones are larger pieces of rock than wallstones, but not as thin and wide as flagstones. These stones are often used to build informal retaining walls, as stepping stones, or to construct a rock garden, according to Haquist Stone.
Tumbled stones are medium-sized pieces of stone that have been put through a tumbler to smooth out the rough, sharp edges. This gives them an old-fashioned, time-worn appearance. They are commonly used to build walls or as cobblestones.