Our river stone sinks are made from river boulders that are mainly found at river beds in China. The correct dimensions are selected and processed into a beautiful stone sink. The river stone sinks are machined and polished by hand. Every river stone sink has its own unique character, color and shape. River stone sinks have a predominantly grey to light brown color. Did you know that we also deliver our stone sinks as a set of two matching sinks? These stone sinks correspond in size, shape and color.