All Rivelins fires are designed for the outdoors. We use only the hardest wearing most suitable materials. This product comes as standard with a polished granite table top. Further granite and ceramic table tops are available at additional cost. Ceramic tops are "Man Made" and represent the latest worktop technology. They are heat resistant, UV resistant and highly resilient against scratching. In addition they are "Zero" maintenance requiring no annual sealing. It is recommended that granite is cleaned and sealed annually. Granite and GP4 ceramic tops have a polished surface, GP1, GP2 and GP3 ceramics have a matt finish.