River Stone refers to naturally smoothed rock material shaped by the continuous movement of water over time. Found along riverbeds, stream banks, and floodplains, these stones are typically rounded or oval, their edges worn down through centuries of tumbling and abrasion. Their surfaces are often polished, sometimes glossy when wet, and they appear in a wide palette of grays, tans, browns, blacks, and even speckled or mottled patterns depending on mineral composition.

Also known as water-worn stones or river rock, they carry the character of flowing water and shifting currents, embodying both fluidity and permanence. As ground materials, river stones are prized for their aesthetic calm and versatility, often used to line paths, form borders, or create dry streambeds in designed landscapes. Beyond their ornamental value, they hold cultural and symbolic associations with continuity, cleansing, and the passage of time, reflecting the enduring relationship between stone and water in nature.