Black river stone 1,Natural stone 2,Polished river stone 3,Black river stone 4,size : 2-3cm/3-5cm/5-8cm/8- ... Our factory is loated in Luhe ,Nanjing --the hometown of River STONE ,where is convenient to NANJING and SHANGHAI port .The factory ... nature pebble stones ,river stones ,color stones ,color sand ,machine-made stone ,pebble tiles ,glass mosaic ,marble ,marble tiles ,engraved stone ,agate ,glass ...