Hi Sidney, This is a type of slate which you can purchase from Eco Outdoor. Depending on where you are there is a showroom in each state. I'd highly recommend on visiting a showroom or even having a look at their website www.ecooutdoor.com.au
Ideas for new finishes around our pool area
Best way to upgrade my old 'rolled edge' pebble crete pool surrounds?
What do you think of glass pools?
landscaping and pool ideas