Our stones are made of a breathable cement mix that help them expand and contract with the weather, so they don't freeze and break. The color is cement pigment so it won't come off or fade. We clear coat the front to keep the sparkle and coquina in place, also keeps the cermics, metals and other pieces from fading. Custom orders are always welcome. Names, dates, addressses. Design your own or we can make something for you. I have an archive of 4 years on Face book at stone age garden art or my current inventory on my website.