... , tumbled or natural. Size is different as customer's requestWe are the stone factory producing stone carvings and products. We take ... river or mountain pebbles polished, and take the pebbles tumbled or just clean the natural pebbles. The size could be as customer' s ... -25mm , 16 -32mm , 30 -40mm , 32 -50mm , 32 -64mm (Other specs. are available) The best selling pebble for the Art Decoration Firm