To make a river stone mat first you have to gather or purchase river stones. After that take a plastic mat and arrange all the stones on it. Then stick all the stones one by one to the plastic mat by using silicone sealer. Let the sealer dry completely.
Hirotoshi Itoh aka Jiyuseki He utilizes stones found in a river bank near his home, to create sculptures that juxtapose the original shape and hardness of the material with surprising humor and texture.
Modern Meets Rustic – A House of Style and Activity