Pizza stones make great pizza, but are susceptible to cracking. A full list of notes on taking care of your stone are listed here. The most important takeaways are: 1) Pizza stones cannot handle quick changes in temperature, meaning, you should never add a cold pizza stone to a hot oven. Preheat the oven with the stone in it. After making your pizza and turning your oven off, let the pizza stone come back to room temperature in the oven as the oven cools (do not take it out of a hot oven). Finally, I’ve heard anecdotal experiences of people whose pizza stones crack because they use the broiler. For some stones, a higher heat (via the broiler) can also cause it to crack. I typically prefer using the broiler in baking pizza as I think it helps give a nice crust, but if you have a pizza stone I would proceed with caution. 2) Moisture can also crack a pizza stone. Do not wash your pizza stone. Do not put anything wet on the pizza stone. Keep it in the oven and scrape off any food bits with a knife or bench scraper. The heat of the oven will naturally self-clean the stone.