Made of natural basalt rock, its small volcanic pores perfectly distribute heat, making an excellent grilling surface for veggies, seafood, small bites and more. No more falling through the cracks! Just lay it on the grate when you fire up your grill, brush with a little oil and it will heat up quickly and retain its heat. The clean-up is the best part: the Grill Stone naturally cleans itself in the heat of the fire. Simply flip the stone over prior to the next use and let the fire clean your grill stone for you.