... ,Natural stone 2,High Polished river stone 3,size : 2-3cm/3-5cm/5- ... factory is loated in Luhe ,Nanjing --the hometown of River STONE ,where is convenient to NANJING and SHANGHAI port . ... have developed many other products ,such as nature pebble stones ,river stones ,color stones ,color sand ,machine-made stone , ... are commonly used for construction ,decoration ,and landscape . high polished river stone