The porous surface absorbs the moisture from the dough and bakes it to a nice crisp. The frame is made of stainless steel with ergonomic handles. No natural stone can withstand the extreme temperature fluctuations that occur in a gas grill and will inevitably develop cracks over time. It has exceptional heat resistance and is completely safe. Due to its composition, it has the ability to absorb moisture from prepared foods, resulting in a particularly crispy crust.