OMG too funny, looked at the box my tiles came in... they are cordierte...
Evidently the same stuff my kiln shelves are made of.
Here is a link that will help you uderstand what you want/get/need...
Baking Steel vs. Ceramic vs. Cordierite Stones | Pizzacraft
Evidently the same stuff my kiln shelves are made of.
Here is a link that will help you uderstand what you want/get/need...
Baking Steel vs. Ceramic vs. Cordierite Stones | Pizzacraft