The Brander gourmet ceramic pizza stone's extraordinary, extra-thick (15mm!) ceramic construction provides superior heat retention and unbeatable durability in all conditions.
Ceramic pizza stones come in many shapes and sizes. And while you can go with whatever shape you prefer, and even whatever size works for your grills, the most important thing to be picky about is the thickness of the ceramic.
As a general rule, the thicker the ceramic, the better. Thin ceramic extra fragile and won't hold on to the heat very well. A thicker ceramic will grab that heat and hang onto it until the cows come home.