Solid River Gravel Stone For Water Filtration, Landscaping

This gray solid river gravel stone, with a thickness of 12 mm and a size range of 15 mm - 20 mm, is ideal for water filtration and landscaping applications. The gravel's physical state is solid with a matte surface finish, and it is classified as natural stone. It has a density ranging from 1460 to 1920 kg/m³. Gravel is categorized by particle size on the Udden-Wentworth scale, with granule-sized (2-4 mm) and pebble-sized (4-64 mm) fragments. According to ISO 14688, it can be graded as fine (2-6.3 mm) or coarse (20-63 mm). Typically, one cubic meter of gravel weighs about 1,800 kg (4,000 lb), and one cubic yard weighs about 3,000 lb (1,400 kg).