Small pebbles, also known as GRIT, are small, rounded stones that are often found on beaches and in deserts. They are usually less than two centimeters in diameter and can be composed of a variety of materials such as quartz, granite, or limestone. GRIT is often used in construction and landscaping projects, as well as for traction on roads and sidewalks. It is also used in gardening and agriculture to improve soil drainage and aeration.