Ranging from 100 to 450mm wide Lucky Stone is the largest of the River Pebbles, these stones are great for feature areas in the gardens, ponds or even mix in with the smaller sizes such as River Pebble 20mm and River Pebble 40mm. Customers have also used Lucky Stone as pet rocks for their children which is just another great use. Like its family the colour of Lucky Stones range from dark browns to greys.